My berried Crystal Red was fanning steadily, then dropped half her clutch after a water change that looked perfect on my old pen. The pen was lagging and inconsistent, and it hid a real TDS jump that stressed her overnight. This guide to the best hm digital com-100 meter for berried shrimp covers 10 COM-100 style options for Caridina and Neocaridina breeders who need steady EC, TDS and temperature control. If you are still dialing in targets, review our TDS for caridina shrimp before you choose.
Berried females are unforgiving of swings. Even a small shift in dissolved solids or temperature can trigger dropped eggs, failed molts, or weak hatch rates in Taiwan Bees and high grade Caridina. COM-100 style meters help because you get EC plus TDS plus temperature in one dip, with better resolution and conversion options than basic pens. You can check new water, tank water, and top off water in under a minute.
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Quick Picks at a Glance
Prime POGHDBXA COM-100 Professional TDS EC Temp Meter
Prime TECJHJZ COM-100 TDS Meter
Digital pH EC TDS Meter COM-100 PH-200 Water
Prime HM Digital TDS-3 Handheld TDS Meter with Carrying
Prime COMOAEW COM-100 EC TDS Meter with Auto
COM-100 4-in-1 Digital pH Meter
HM Digital HM-100 Hydromaster Continuous pH, TDS
Prime HM Digital COM-100 Waterproof EC/TDS & Temperature
HM Digital COM-100 Waterproof EC/TDS & Temperature
HM Digital COM-300 Waterproof pH, TDS
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Pros
- High accuracy EC, TDS and temperature measurement in one device
- Automatic calibration saves time and improves reading reliability
- Data hold function helps capture results outdoors or in the field
- Portable kit with protective cap and carrying case for safe storage
- Broad use range from drinking water to pools, aquariums and hydroponics
Cons
- No smart connectivity or app logging for long term tracking
- Specs list no backlight, so low light visibility may be limited
- 1.1 pound kit with case feels bulkier than slim pen style testers
The POGHDBXA COM-100 is a professional multiparameter tester that measures EC, TDS and temperature in one device. It is designed for pool and spa owners, hydroponic growers, aquarium keepers and anyone monitoring drinking or tap water.
Automatic calibration makes it easy to get consistent, accurate readings without manual adjustments. The data hold function freezes the result on the digital LCD so you can lift the probe and record it, which is handy for outdoor testing and nutrient solution checks.
The meter has a compact, pen style body with a protective cap and included carrying case for safe transport. Controls are simple enough for beginners, while accuracy and speed will satisfy more experienced users testing on the go or at home.
The specification lists no backlight and no smart features, despite mentions of low light use, so visibility and data logging may be limited. At 1.1 pounds with case, it is also slightly heavier than ultra slim pocket testers.
Overall, the COM-100 is a practical, versatile choice for fast daily water quality checks across multiple applications. If you want a portable EC TDS temp meter with auto calibration and hold function, it covers the essentials well.
Brand: POGHDBXA
Model: COM-100, Item 94547554
Functions: EC, TDS and temperature measurement with automatic calibration and data hold
Display: Digital LCD for easy reading
Includes: Protective cap and carrying case for portable use
Best For: Pool, spa, tap water, drinking water, aquariums, hydroponics and nutrient solutions
Pros
- High accuracy EC, TDS and temperature measurement in one compact tool
- Automatic calibration and digital LCD make it beginner friendly and efficient
- Data hold function is ideal for field testing and logging results
- Includes protective cap and carrying case for portability and probe protection
- Works across pools, drinking water, aquariums, wells and hydroponics
Cons
- No smart connectivity or app sync for tracking long term trends
- Listing shows conflicting backlight details, so low light visibility may vary
- 1.1 pound build is bulkier than slim pen style testers for pocket carry
The TECJHJZ COM-100 is a professional multiparameter meter designed to measure EC, TDS and temperature in one handheld tool. It is built for pool and spa owners, well users, aquarium keepers and hydroponic growers who want quick checks at home or in the field.
Its standout strengths are automatic calibration and combined EC, TDS and temp readings on a clear digital LCD. In real world use, the data hold function makes it easy to freeze a result for logging, which is helpful for testing nutrient solutions, tap water and pool water back to back.
The meter has a compact portable body with a protective cap and included carrying case for travel and storage. Controls are simple enough for beginners, while consistent performance will suit experienced users who monitor water daily or weekly.
There are a few tradeoffs to note, including no smart features for app tracking and some confusion around backlight support in the listing. At 1.1 pounds it also feels bulkier than slim pen style testers, so it fits better in a toolkit than a pocket.
Overall, the COM-100 is a practical choice for anyone who needs dependable multipurpose water testing without complexity. If you want a portable EC and TDS tester for home, pool and hydroponics with easy calibration, this model covers the essentials well.
Model: COM-100 by TECJHJZ, Item model number 8188698. Category: Multiparameter Meters with digital display for EC, TDS and temperature.
Functions include automatic calibration, data hold measurement and handheld portable operation. Package includes meter with protective cap and carrying case for home and field use.
Physical specs list package dimensions of 0.39 x 0.39 x 0.39 inches and item weight of 1.1 pounds. Smart device support is not included, this is a standalone manual tester.
Remove the protective cap and rinse the probe in clean water before each test. Power on the meter, dip it into the sample and wait for the EC, TDS and temperature values to stabilize.
Run automatic calibration periodically to keep readings accurate. Press data hold to freeze the display when testing in bright sun or awkward angles around pools and tanks.
This meter suits tap water, drinking water, wells, pools, spas, aquariums and hydroponic reservoirs. Rinse after use, replace the cap and store in the carrying case to extend probe life.
Pros
- Combines pH, EC, TDS and temperature in a single compact tester
- Automatic calibration simplifies use for beginners and experienced users
- Lightweight pen format is easy to carry, store and use on the go
- Versatile for multiple applications from aquariums to hydroponics to home water
Cons
- Generic branding means limited manufacturer documentation and support details
- Product listing lacks detailed accuracy ranges, measurement ranges and included accessories
- Pen style testers require regular calibration and careful storage to maintain accuracy
The HM COM-100 style PH-200 digital tester is an all in one pen meter designed to measure pH, EC, TDS and temperature. It is aimed at aquarium keepers, hydroponic growers, pool owners and anyone monitoring drinking water quality at home.
Its main appeal is convenience, combining four key water parameters in one handheld device with automatic calibration. In real world use, that means faster spot checks for nutrient strength, pH balance and general water purity without juggling multiple tools.
The pen format is slim, digital and highly portable at only 1.76 ounces, making it easy to dip, read and store. Operation is straightforward with a digital readout intended for quick, clear results in the field or at home.
The tradeoffs come from limited product information, with no published measurement ranges or accuracy specs in the listing. As a generic model, long term support, probe replacement options and included calibration supplies are also unclear.
Overall, this PH-200 COM-100 tester is a practical choice if you want a compact multitester for routine water checks. If you need certified lab accuracy or full documentation, you may want to confirm specs with the seller before buying.
Model: PH-200, HM COM-100 style water quality pen tester, model number UBOCWGABA-HMCOM-100.
Measures: pH, EC, TDS and temperature with digital display for quick readings.
Calibration: Automatic calibration function for easier setup and consistent use.
Design: Compact pen style housing, item weight 1.76 ounces for portability.
Pros
- Accurate and consistent readings for tap water, RO systems and nutrient solutions
- Very easy to use with fast results on a clear LCD display
- Compact and rugged with included carrying case and belt clip for field use
- Useful Hold function and built-in thermometer add practical convenience
- Comes with batteries included so it is ready to test right away
Cons
- Measures dissolved solids only and does not test for biological contaminants
- May need occasional recalibration with calibration solution for best accuracy
- Single function design does not measure pH or EC like combo meters
The HM Digital TDS-3 is a pocket style TDS meter that measures total dissolved solids to give a fast snapshot of water purity. It is ideal for RO and filter owners, hydroponic growers, aquarium hobbyists, and anyone monitoring drinking water, pools or spas.
It measures 0 to 9990 ppm with 1 ppm resolution and plus or minus 2 percent accuracy, plus automatic temperature compensation for stable results. In real use, it quickly shows tap versus filtered water quality and helps confirm when a filter needs replacement or nutrients need adjusting.
The design is compact, lightweight and rugged, with a clear LCD, simple push button operation and Hold function to lock readings for recording. It includes a protective carrying case with belt clip and comes with batteries, plus auto shutoff to save power.
It only measures dissolved solids and does not test for bacteria or other biological contaminants. Some users find it needs occasional recalibration with standard solution to stay spot on, and it does not measure pH or EC like combo meters.
For fast, reliable everyday TDS checks, the TDS-3 remains a top pick for home and commercial use. It is simple, dependable and portable, making it an excellent tool for maintaining cleaner water and healthier systems.
Measurement Range: 0 to 9990 ppm with 1 ppm resolution and plus or minus 2 percent readout accuracy for precise monitoring.
Functions: Hold function for recording, auto off after 10 minutes, built in digital thermometer and automatic temperature compensation.
Power and Build: Battery powered by 2 LR44 batteries included, compact handheld housing with protective carrying case and belt clip.
Pros
- Combines EC, TDS and temperature monitoring in a single device
- Automatic calibration reduces setup time and user error
- Data hold helps capture stable readings in the field
- Portable kit with cap and case ideal for home and on the go use
Cons
- Specifications list no backlight, which limits use in dim conditions
- Sensor probe requires regular cleaning and careful handling to stay accurate
- Calibration solution needs and replacement frequency are not clearly listed
The COMOAEW COM-100 is a professional handheld EC, TDS and temperature tester built for pool, spa, hydroponics and home water monitoring. It suits beginners and experienced users who want quick checks of tap water, drinking water, aquariums and nutrient solutions.
Standout features include automatic calibration, combined EC and TDS measurement plus temperature readout on a clear digital LCD. The data hold function freezes the reading on screen, which makes it easier to record results accurately without rushing.
The meter has a compact pen style body with protective cap and included carrying case for safe transport. It feels portable enough for field testing yet sturdy for regular home use and repeated dipping.
The main limitation is low light visibility, as specifications list no backlight despite outdoor use claims. Like all EC testers, it also needs proper rinsing, storage and periodic calibration to maintain accuracy over time.
Overall, the COM-100 is a practical multi use tool for anyone managing water quality across pools, spas and grow systems. If you want a portable, easy to read tester with auto calibration and data hold, it is a solid choice for routine monitoring.
Brand: COMOAEW, Model: COM-100, Item Model Number: 0000
Functions: EC, TDS and temperature testing for pools, spas, hydroponics, aquariums and drinking water
Display: Digital LCD with data hold function for stable readings
Calibration: Automatic calibration for easy setup and consistent accuracy
Design: Compact handheld pen with protective cap and carrying case for portable use
Pros
- Versatile 4-in-1 function covers key water parameters in a single device
- Portable battery powered operation is convenient for spot checks anywhere
- Suited to multiple uses from hydroponics and aquariums to drinking water
- Simple digital operation ideal for beginners and experienced users alike
Cons
- Generic branding may mean limited manuals, warranty or customer support
- Listing lacks detailed accuracy, range and calibration information
- Battery powered design requires replacement batteries for continued use
The COM-100 is a 4-in-1 digital water quality tester that measures pH, TDS, EC and temperature in one handheld unit. It is built for hydroponic growers, aquarium owners and anyone monitoring drinking water safety.
Having four key readings in one tool saves time during daily checks and nutrient mixing. The digital display helps you get quick readings for pH balance, dissolved solids and temperature without switching devices.
The unit is battery powered and compact, so it is easy to carry for tank side, garden or field testing. Its COM-100 body is designed as a simple stick meter with straightforward controls for everyday use.
The listing does not provide full details on measurement ranges, accuracy or calibration steps. Generic branding also means buyers may get less documentation and after sales support than with major meter brands.
Overall, this tester is a practical all in one option for routine water monitoring at home or in small grow setups. If you need multi parameter convenience in a portable format, the COM-100 is worth considering.
Model: COM-100, listed within COM-300, COM-360, PH-200, ORP-200 series tester family.
Functions: 4-in-1 measurement for pH, TDS, EC and temperature.
Power Source: Battery powered for portable handheld use.
Intended Use: Drinking water, hydroponic systems, aquariums and general water quality testing.
Pros
- Monitors four key parameters simultaneously, saving time over handheld testers
- Continuous readout is perfect for hydroponics and aquaculture stability
- Lightweight 9.6 ounce freestanding unit with simple corded power
- Versatile across labs, pools, spas, boilers and water purification uses
Cons
- Plastic construction feels less rugged than lab grade benchtop instruments
- Corded power requires a nearby outlet, limiting placement flexibility
- Listed under faucet mount filters, so buyers should verify it is a monitor, not a filter
The HM Digital HM-100 Hydromaster is a continuous water quality monitor that measures pH, EC, TDS and temperature in one unit. It is built for hydroponic growers, aquaculture operators, lab technicians, pool owners and anyone managing RO or water treatment systems.
Its standout strength is always on monitoring, so you can spot nutrient drift, pH swings or temperature shifts without grabbing test strips. For reservoirs, dosing systems and filtration loops, that real time visibility helps keep chemistry stable and plants or aquatic life healthy.
The unit uses a compact freestanding design at 4.5 by 1.5 by 8 inches with corded electric power for dependable operation. The plastic housing keeps it light at 9.6 ounces, and included SP-P5 and SP-C2 components support a straightforward setup.
There are tradeoffs to consider. The plastic build is practical but not as robust as premium lab equipment, and corded power means you need an outlet nearby. It is also miscategorized in some stores as a filter, so confirm you are ordering a monitor.
Overall, the HM-100 is a smart pick for users who need continuous, multi parameter insight rather than spot checks. If you run hydroponics, aquaculture, a lab or a treatment setup, it delivers convenience and control in a compact package.
Model: HM Digital HM-100 Hydromaster, 4-in-1 pH, EC, TDS and Temperature Monitor.
Power and Install: Corded electric, freestanding design for continuous use.
Dimensions and Build: 4.5L x 1.5W x 8H inches, 9.6 ounces, durable plastic housing.
In the Box: Includes SP-P5 and SP-C2 sensors, boxed packaging, part number HM-100.
Pros
- Accurate to within plus or minus 2 percent with easy digital recalibration
- Waterproof and lightweight design ideal for wet and outdoor environments
- Large LCD shows EC/TDS and temperature simultaneously
- Versatile for pools, spas, hydroponics, aquariums, drinking water and labs
Cons
- Some users report rapid battery drain during storage
- Requires fresh batteries and periodic recalibration for best performance
- Switching scales and calibration modes may take practice for beginners
The HM Digital COM-100 is a professional grade combo meter that measures electrical conductivity, total dissolved solids and temperature in one compact tool. It is designed for hydroponic growers, pool and spa owners, aquarium keepers, water treatment pros and lab users who need more precision than test strips.
Standout performance comes from its four measurement scales in uS, mS, ppm and ppt, plus three selectable conversion factors including KCl, 442 and NaCl. Users report fast, stable readings with accuracy within plus or minus 2 percent, and push button digital calibration keeps results trustworthy over time.
Built for real world use, the meter features an IP67 waterproof housing, lightweight plastic body and large LCD with simultaneous temperature readout. The half second response time, data hold function and auto off feature make field testing and continuous monitoring quick and convenient.
It is not perfect, as some owners note faster than expected battery drain during storage and a learning curve for switching scales and calibration modes. Checking batteries before use and keeping calibration solution on hand will prevent most frustrations.
Overall, the COM-100 delivers lab level versatility at a handheld size, making it a smart investment for anyone serious about water quality. If you need dependable EC and TDS testing across multiple applications, this is a proven and versatile choice.
Measurement Range: 0 to 9990 uS, 0 to 8560 ppm, 0 to 9.99 mS, 0 to 8.56 ppt with temperature readout up to 130 F.
Additional features include IP67 waterproof rating to 1 meter, digital push button calibration, data hold, auto off and low battery indicator.
The unit is battery powered, offers about 100 hours of battery life, weighs 120 grams and measures 8.9 inches long for easy one handed use.
Pros
- Combines EC, TDS and temperature in one portable meter
- Waterproof design suited for wet environments
- Ultra lightweight and compact for field use
- Well suited for hydroponics, pools and lab applications
Cons
- Limited product documentation and feature details available
- Older model first released in 2012, may lack modern display features
- Larger 9.5 inch length is less pocket friendly than pen style meters
The HM Digital COM-100, model 4023, is a waterproof EC/TDS and temperature combo meter designed for industrial and scientific water testing. It is aimed at hydroponic growers, pool and spa operators, aquarium keepers and lab technicians who need fast checks.
Its standout strength is three in one measurement, giving EC, TDS and temperature from a single probe. In real world use, that means quicker nutrient checks, easier pool balancing and more consistent reservoir management without carrying multiple tools.
At 3.2 ounces with a 9.5 inch handheld body, it is built for portability and wet environments. The waterproof housing adds confidence around tanks, reservoirs and pools, while the HM Digital and Hydrofarm pedigree supports dependable everyday use.
Drawbacks include sparse feature documentation and an older design dating to 2012. It also runs larger than modern pen testers, so it is less discreet for pocket carry and lacks backlit or smart features some users expect today.
Overall, the COM-100 remains a practical choice for anyone who values simple, durable EC/TDS plus temperature testing. If you need a rugged combo meter for hydroponics or water maintenance, it is a reliable, purpose built option.
Brand: HM Digital, Model: COM-100, Model Number: 4023, Manufacturer: Hydrofarm Inc
Function: EC/TDS and Temperature combo measurement for hydroponics, pools, aquariums and labs
Dimensions: 9.5 x 3.2 x 2.2 inches, Weight: 3.2 ounces, Design: Waterproof handheld meter
Category: Conductivity Meters and Accessories, ASIN: B00VKQYYYG
Pros
- Measures four key water parameters in a single tool, saving time and gear
- Waterproof and reusable build suited for outdoor and hydroponic use
- High accuracy sensors with ATC and digital calibration for dependable readings
- Lightweight portable design with digital display and batteries included
Cons
- pH probe requires regular calibration and moist KCl storage to stay accurate
- Multiple EC, TDS and conversion modes can be confusing for beginners
- Runs on AAA batteries, so frequent testers will need replacements
The HM Digital COM-300 is a professional grade combo meter designed to test pH, EC, TDS and temperature with one device. It is built for hydroponic growers, pond keepers, water gardeners and anyone managing nutrient or water quality daily.
Standout performance comes from dual TDS conversion factors, letting you switch between 0.5 NaCl and 0.7 442 scales for precise feeding. Automatic Temperature Compensation adjusts readings in real time, while digital calibration keeps pH and conductivity measurements stable and repeatable.
The handheld unit features a clear digital display, simple controls and a fully waterproof housing for use around tanks, reservoirs and outdoor ponds. At just 150 grams and powered by AAA batteries, it is light, portable and ready for quick spot checks.
It does need routine care to perform its best, as the pH probe must stay moist with KCl storage solution and requires periodic calibration. Beginners may also need time to learn the S, mS and ppm modes and choose the correct conversion factor.
Overall, the COM-300 is a versatile, high accuracy solution for users who want lab style insight without carrying multiple meters. If you need reliable all in one water testing for hydroponics or ponds, it is a smart, long term investment.
Model COM-300 (Part 716141) by HM Digital, measures pH, EC, TDS and temperature in one meter. Designed for hydroponic systems, ponds, water gardens and other water quality applications.
Measurement modes include EC in S and mS, TDS in ppm with selectable 0.5 and 0.7 conversion factors, plus Automatic Temperature Compensation. Digital calibration supports precise and repeatable results.
Build features waterproof reusable housing with digital display, 150 gram weight and 130F upper temperature range. Rated for outdoor use around wet environments.
Powered by 2 AAA batteries included, with sump type screened inlet for stable sampling. Store with cap sponge moist using KCl pH storage solution to protect probe life.
Buying Guide: Choosing a COM-100 Style Meter for Berried Shrimp
Accuracy, EC Scales and Conversion Factors
You want a meter that reads both EC and TDS clearly, because EC tells you the true electrical load while TDS is a converted estimate. The HM Digital HMDCOM100 Waterproof EC/TDS And Amp stands out here with four scales for microsiemens, millisiemens, ppm and ppt, plus three nonlinear conversion factors including KCl, 442TM and NaCl. That flexibility matters when you remineralize RO water and want readings that match your shrimp keeping routine.
For breeding tanks, look for automatic calibration, stable probe response, and a display you can trust at low ranges around 100 to 150 TDS for Caridina. Options like Professional COM-100 EC Analyzer TDS Meter Temp and TDS Meter, Professional COM-100 EC Analyzer TDS emphasize automatic calibration and data hold for repeat checks. Pair your meter discipline with RO systems for precise TDS control so your starting water is consistent every time.
Waterproofing and Probe Design for Daily Tank Dips
Berried tanks demand frequent testing, often with wet hands over an open lid. A waterproof housing with an IP67 rating gives you confidence when you dip near the waterline or rinse the probe after use. The HM Digital HMDCOM100 Waterproof EC/TDS And Amp and Hm Digital Hmdcom100 Waterproof Ec/Tds are built for that kind of daily aquarium use, with a screened sensing area that resists debris and baby shrimp interference.
Also check for a tight protective cap, a belt clip case, and a probe that rinses clean quickly. The HM Digital TDS-3 Handheld TDS Meter With Carrying includes a carrying case with belt clip and auto shutoff after 10 minutes, which is handy on a breeding rack. Always rinse in RO or distilled water, shake off excess, then cap it to keep mineral crust from skewing your next berried tank reading.
Temperature Reading and Hold Function for Low Stress Testing
Temperature changes EC readings, so built in temperature measurement with compensation is essential for berried shrimp. You need to know if new water is within one degree of tank water before it touches a berried female. Meters like Digital PH-200 PH Meter COM-100 EC TDS Meter and Digital PH Meter HM 2/3 /4 in 1 TDS EC Temp PH promote combined temp plus TDS checking, which helps you avoid cold shock during water changes.
A hold function is underrated for breeders. It freezes the number on screen so you can lift the meter out and read it without dripping tank water across your stand or hovering over shy females. Several COM-100 style listings highlight data hold plus backlit display for low light fish rooms. Your results only matter if your storage is stable, so follow how you store remineralized RO water and test storage bins before use.
Handheld Spot Checks vs Continuous Monitoring
Most breeders do best with a handheld COM-100 style meter for spot checks of new water, tank water, and acclimation cups. It is fast, portable, and easy to move between a 10 gallon Caridina tank and a Neocaridina cull tank. If you run multiple breeding tanks, keep one meter dedicated to shrimp only and never use it for fertilizers or pool water to prevent cross contamination.
Continuous monitors have a place on high value racks. The HM-100 Hydromaster – Continuous pH/TDS/EC/Temp is designed for ongoing pH, EC, TDS and temperature observation in one place, which suits a central breeding system. The HM Digital Com-300 Ph/Tds/EC/Temp Meter adds pH alongside EC, TDS and temperature for keepers who want fewer pens around berried females. Choose handheld for flexibility, continuous for constant oversight.
My Experience
I run a 10 gallon Caridina tank with Crystal Reds and a few Shadow Mosura crosses, buffered soil, GH 5, KH 0 to 1, and TDS held at 125 to 135. I used the HM Digital HMDCOM100 Waterproof EC/TDS And Amp as my daily driver for six weeks while two females were berried. Dips were fast, temperature matched my separate thermometer closely, and switching between microsiemens and ppm helped me learn how my remineralizer behaved after water changes.
What I appreciated most was the hold function during late night checks. I could dip, lift, read outside the tank, and avoid startling a fanning female under the sponge filter outflow. I cross checked weekly against the HM Digital TDS-3 Handheld TDS Meter With Carrying for quick sanity reads, and kept notes on a card taped to the stand. That routine, plus stable soil and careful feeding from my shrimp breeding tank substrate setup, gave me a full hatch with strong shrimplets grazing within days.
Final Thoughts
If you want one dependable dip meter for berried Caridina, choose HM Digital HMDCOM100 Waterproof EC/TDS And Amp for its EC and TDS range and waterproof build, and if you also want pH in the same workflow pick HM Digital Com-300 Ph/Tds/EC/Temp Meter to simplify your breeding station.
Frequently Asked Questions
Why do berried shrimp need more stable TDS than non berried shrimp?
Berried females are carrying developing embryos that respond quickly to osmotic stress. A sudden rise or fall in TDS can cause her to fan harder, molt early, or drop eggs to protect herself. Stable EC and temperature keep molting hormones and egg development on track, which is why breeders test new water before every change in 2026.
Is a COM-100 style meter better than a basic TDS pen for breeding Caridina?
For serious breeding, yes. COM-100 style meters typically offer EC plus TDS plus temperature, selectable conversion factors, and better low range stability than ultra basic pens. That helps you match remineralized RO water precisely instead of guessing. Keep flow gentle too with baby safe sponge filters so newborn shrimplets are not stressed after hatching.
What TDS and EC should I target for berried Caridina vs Neocaridina?
Most Caridina keepers target TDS 100 to 150 ppm with GH 4 to 6 and KH 0 to 1, which often reads around 200 to 300 microsiemens depending on conversion factor. Neocaridina usually prefer TDS 180 to 250 ppm with GH 6 to 8 and KH 2 to 4. Always confirm with your breeder source in 2026 and acclimate slowly, since colony history and soil buffering shift ideal numbers.
How often should I test and calibrate when females are berried?
Test tank water twice weekly and test every batch of new water before it enters the tank. Rinse the probe in RO water after each use and calibrate with fresh solution as directed by the maker when readings drift or monthly in 2026. If TDS creeps up unexpectedly, check evaporation, overfeeding, and soil exhaustion with our ADA Amazonia versus Fluval Stratum comparison to understand buffering shifts.
Browse more picks in our Water Test Kit category, or see our related guide on TDS for Caridina Shrimp: Ideal Range and Top Tools 2026.
This roundup is not the right choice if you only need a single one-time reading; a liquid test kit is aimed at keepers who want to monitor parameters regularly over time.
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