If you are comparing inert substrate for shrimp vs ADA Amazonia, you are really deciding between stable tap water chemistry and active soft water buffering. ADA Aqua Soil Amazonia Ver 2 (9L) is an active soil that naturally buffers and lowers pH and hardness, while Aqua Natural Aquarium Substrate is an inert quartz gravel that leaves your source water exactly as it is.
That choice matters most for Neocaridina versus Caridina, for planted versus shrimp only tanks, and for precision versus low maintenance. If you want rich plant growth with soft water shrimp, buffering helps. If you want predictable water changes with hardy colonies, inert is often simpler. Our Active Soil + Substrate coverage breaks down the same tradeoff across different tank styles.
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Quick Picks at a Glance
Prime ADA Aqua Soil Amazonia Ver 2 9L Planted Aquarium
Prime Aqua Natural Diamond Black Aquarium Gravel 10lb
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Pros
- Superior plant growth and vibrant color from nutrient rich black soil plus root focused supplement
- Buffers pH and softens water to create ideal conditions for plants, tetras, shrimp and other soft water species
- Less algae and cloudy water issues than Version 1 according to experienced users
- Natural dark look and ideal granule texture for aquascaping slopes, carpets and stem plants
- Easy to use for beginners building a fully planted tank
Cons
- Causes an initial ammonia spike for several weeks, so tank must be cycled before adding fish or shrimp
- Nutrient supplement pellets are potent and must be placed carefully under the soil to avoid excess nutrients
- Premium aquasoil with higher upfront cost and may need root tabs over time as nutrients deplete
ADA Aqua Soil Amazonia Ver 2 is a 9 liter planted tank substrate made from rare Japanese black soil, designed for Nature Aquariums. It is built for beginners and experienced aquascapers who want lush growth, vivid color and crystal clear water.
Standout performance comes from the separate bag of Amazonia concentrate supplement placed under the soil to feed roots without clouding the water column. In real tanks, it buffers pH to slightly acidic soft water, supports strong root growth and helps reds and greens look richer.
The granules have a natural irregular shape with ideal size and density for planting and for holding slopes. The deep black color creates sharp contrast against plants and fish while giving a natural riverbed look that stays attractive over time.
The main drawback is the initial ammonia release during the first few weeks, which requires fishless cycling and frequent water testing. New hobbyists may also find the concentrate pellets strong if overdosed, and carpeting plants still need good light, CO2 and maintenance to thrive.
Overall, Amazonia Ver 2 remains the benchmark aquasoil for high tech planted tanks with cleaner water and fewer algae issues than the original. If you want premium substrate that rewards proper cycling with thriving plants and fish, this is the one to buy.
Brand: ADA, Model: Amazonia Ver 2, Volume: 9 Liters, Weight: 7 kg. Style: Japanese black soil for freshwater planted aquariums.
Includes base black soil plus separate Amazonia concentrate supplement for targeted root nutrition. Granule structure is designed for root development, aquascaping and natural appearance.
Best for freshwater Nature Aquariums with aquatic plants and soft water tropical fish. Not intended for marine or hard water cichlid setups.
Rinse is not required. Place concentrate pellets on the tank bottom where heavy root feeders will grow, then cap fully with Amazonia Ver 2 soil.
Fill slowly to avoid disturbing the substrate, then cycle fishless for several weeks with regular water changes and ammonia testing. Add plants early and livestock only after ammonia and nitrite read zero.
Use good lighting, CO2 and filtration for best carpet growth, and recharge with root tabs over time as nutrients are consumed.
Pros
- Natural quartz is aquarium safe and supports biological filtration
- Fine grain is excellent for rooting plants like anubias and amazon swords
- Rich black finish creates strong visual contrast in planted tanks
- Evenly graded texture provides clean coverage without sharp pebbles
- Versatile for freshwater aquariums, fish tanks and terrariums
Cons
- Not recommended for snails or bottom feeders according to directions
- Requires rinsing until water runs clear to remove residual dust
- Black color shows debris and uneaten food easily, so needs regular vacuuming
Aqua Natural Diamond Black is a 10lb bag of fine natural quartz gravel designed as substrate for freshwater aquariums and terrariums. It is best for hobbyists with planted tanks who want a dark, natural base that makes fish and greenery stand out.
The standout trait is the quartz composition, which sparkles subtly under aquarium lighting thanks to light reflecting facets. In real tanks, the 1-2mm grain anchors roots well for plants like anubias and amazon swords while giving bacteria extra surface area to colonize.
Build quality feels premium, with evenly graded stone that sits between sand and traditional pebble gravel. The deep black color is consistent, coverage is smooth, and the 100 percent natural stone is safe for most aquatic life when rinsed properly.
There are a few tradeoffs to know. The manufacturer does not recommend it for snails or bottom feeders, and light dust requires rinsing until water runs clear. Black substrate also shows uneaten food and debris more easily, so regular vacuuming helps.
Overall, this is an excellent choice if you want a clean, modern planted look with biological benefits. For contrast, plant support and sparkle, Diamond Black delivers standout value in a classic fine gravel format.
Brand: Aqua Natural, Model DIAMOND010, Diamond Black Quartz
Size: 10LB bag with fine 1-2mm grain texture
Material: 100 percent natural quartz stone in black color
Use: Substrate for aquariums, fish tanks and terrariums, ideal for planted setups
Care: Rinse lightly until water runs clear before placing in tank base
How They Compare
Active Buffering vs Inert Stability
ADA Aqua Soil Amazonia Ver 2 (9L) is made to change your water in a helpful direction for plants and soft water livestock. It helps to naturally buffer and lowers the pH level and hardness of the water to an ideal level for most aquatic plants, which is exactly what Taiwan Bee and Crystal shrimp keepers usually want. Aqua Natural Aquarium Substrate does the opposite by doing nothing chemically, since its 100 percent natural quartz composition is aquarium safe and inert.
For you, that means ADA Aqua Soil Amazonia Ver 2 (9L) gives you more control over soft water but adds more variables during water changes and rebuffering over time. Aqua Natural Aquarium Substrate gives you rock solid stability for Neocaridina, cherry shrimp, Amano shrimp, and other shrimp that thrive in your tap water. If your tap is already soft and acidic, inert keeps life simple, while if your tap is hard and alkaline, active soil does useful work.
Grain Size, Texture and Root Support
ADA Aqua Soil Amazonia Ver 2 (9L) uses granules of size and density ideal for fast development of healthy plant root systems, with a natural irregular shape that produces a natural look. Roots spread easily through it, carpeting plants anchor well, and stem plants stay put without crushing stems. Aqua Natural Aquarium Substrate is graded to 1 to 2 mm, which the maker describes as falling between sand and traditional pebble gravel for a fine, natural looking substrate.
In daily shrimp keeping, both let shrimplets forage without getting trapped, but they feel different to work with. ADA Aqua Soil Amazonia Ver 2 (9L) is lighter and easier to plant into, though strong siphoning can pull up granules. Aqua Natural Aquarium Substrate feels denser and holds slopes and hardscape edges well, and its fine grain provides optimal coverage and plant anchoring. See our active soil basics if you are still learning how grain size affects vacuuming and mulm buildup.
Nutrients, Cycling and Water Clarity
ADA Aqua Soil Amazonia Ver 2 (9L) is built for planted tanks, made with rare Japanese plant based black soil and includes a bag of Amazon concentrate supplement separately. That supplement enables local enhancements of organic components and essential elements that accommodate different layout patterns with various types of aquatic plants. Aqua Natural Aquarium Substrate has no added soil nutrition, though its huge quartz surface area offers added space for establishment of tank cleaning bacteria and promotes good bacteria growth.
You should expect a different start up with each one. ADA Aqua Soil Amazonia Ver 2 (9L) is ideal for beginners seeking a beautiful fully planted aquarium with crystal clear water, but keepers commonly report it needs a proper cycle before adding sensitive Caridina because rich soils release organics at first. Aqua Natural Aquarium Substrate cycles like any inert gravel, so you can focus on filter maturity rather than soil leaching, but you will need root tabs or liquid feeding if you want demanding rooted plants to thrive.
Color Contrast, Shrimp Visibility and Longevity
Both are dark substrates that make shrimp pop, but the finish is different. ADA Aqua Soil Amazonia Ver 2 (9L) has a dark black color that contrasts well against leaf colors and makes aquatic plant colors stand out, with a soft matte soil look. Aqua Natural Aquarium Substrate is Diamond Black fine gravel made of natural quartz that sparkles underwater due to light reflecting facets, creating an attractive substrate that contrasts well with a planted tank to enhance appearance.
Longevity is where they split. ADA Aqua Soil Amazonia Ver 2 (9L) holds a strong 4.7 out of 5 from 294 reviews for plant performance, but like all aquasoils it will soften and lose buffering strength over many months and eventually need refreshing. Aqua Natural Aquarium Substrate holds 4.5 out of 5 from 2530 reviews and quartz does not break down, so you never replace it for nutrient exhaustion. If you hate rescaping, inert wins, while if you replant often, soil is more forgiving.
Which One Should You Get
Choose ADA Aqua Soil Amazonia Ver 2 (9L) if you keep Caridina Crystal, Taiwan Bee, or other soft water shrimp in RO water, or if you run a heavily planted shrimp tank where root feeding and lower pH and hardness help. You should be comfortable with active soil cycling, gentler water changes, and monitoring buffering over time. It is the higher-end pick for aquascaped breeding tanks where plant color and shrimplet survival in soft water matter most, and you can learn more in our substrate guides before you set it up.
Choose Aqua Natural Aquarium Substrate if you keep Neocaridina cherry shrimp, yellow shrimp, blue dream, Amano, or ghost shrimp in tap water and you value stability over manipulation. You want easy gravel vacuuming, no soil dust cloud when you replant, and a substrate that never exhausts. It is also the better fit for shrimp only or lightly planted tanks, for beginners who want a fast cycle, and for anyone using hard tap water where fighting parameters with soil would create constant swings.
My Experience
I have run both styles side by side in my shrimp rack, with ADA Aqua Soil Amazonia Ver 2 (9L) in a planted Caridina tank and Aqua Natural Aquarium Substrate in a Neocaridina cull tank. The Amazonia tank took longer to settle, but once cycled the plants rooted fast, the water stayed crystal clear, and berried females grazed constantly on the soft granules. The Diamond Black tank was boring in the best way, with stable molts, easy cleaning, and great color contrast, though my swords needed root tabs to match the growth I saw in soil as of September 2026.
Who Should Skip Both
If you keep Sulawesi shrimp that need high pH and mineral rich hard water, or you run a bare bottom breeding rack focused only on maximum shrimplet counts and daily siphoning, these dark substrates are not ideal for your goal. Neither product suits keepers who want bright white sand for photography or who need a calcium rich cichlid mix, and you should not buy active soil if you are unwilling to cycle and test through the early weeks.
Frequently Asked Questions
Is inert gravel or ADA Amazonia better for Neocaridina cherry shrimp?
For most Neocaridina, inert Aqua Natural Aquarium Substrate is simpler because it keeps your tap parameters stable and avoids pH swings. ADA Aqua Soil Amazonia Ver 2 (9L) can work, but it is usually unnecessary unless your tap is very hard or you also want a high demand planted scape.
Can I use ADA Aqua Soil Amazonia Ver 2 with tap water for Caridina?
You can, but most Caridina keepers get more consistent results with RO water remineralized for soft water shrimp because tap hardness fights the soil buffering. If you use tap, test often after water changes and change smaller amounts to avoid swings. Inert substrate is the lower maintenance choice for hard tap water.
Will Aqua Natural Diamond Black grow plants as well as Amazonia?
It will anchor plants well with its 1 to 2 mm quartz grain and support bacteria, but it has no soil nutrition like the Amazon concentrate supplement in ADA Aqua Soil Amazonia Ver 2 (9L). Expect slower rooted growth unless you add root tabs and feed the water column. For mosses, Anubias, and floating plants, the difference is much smaller.
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