Planning a shrimp tank involves a surprising amount of arithmetic: how many liters of active soil to buy, how many shrimp a 10-gallon can support, whether your tap water will suit crystal reds or only cherries. These free calculators do the math for you. They run in your browser, need no sign-up, and every page explains the formula behind the numbers so you can check our work.

Aquarium Volume & Substrate CalculatorReal water volume in gallons & liters, plus how many liters of soil to buy.Shrimp Tank Stocking CalculatorHow many cherry, crystal, Amano or ghost shrimp your tank can hold.Shrimp Water Parameter Chart & CheckerEnter pH, GH, KH and TDS to see which shrimp species suit your water.RO & Tap Water Mix and Water Change TDS CalculatorMix RO + tap to a target TDS, and predict TDS after a water change.Nitrogen Cycle Tracker for Shrimp TanksLog ammonia, nitrite and nitrate — see which stage your cycle is at.Shrimp Molting Problems TroubleshooterFailed molts or white ring of death? Find the likely cause in four questions.Shrimp Tank Algae Guide (Shrimp-Safe Fixes)Green spot, hair or staghorn? Cause and shrimp-safe fix for each type.Cherry Shrimp Breeding PlannerColony timeline, Neocaridina vs Caridina params, and a cull chart.Planted Shrimp Tank Light CheckerIs your light low, medium or high — and which plants suit it?

Using these tools together

Most keepers use them in order. Start with the aquarium volume calculator to get your real water volume and how much substrate to buy. Then run your test-kit numbers through the water parameter checker to see which species your water suits without heavy remineralizing. Finally, the stocking calculator tells you how many shrimp to start with and roughly where the colony will level off.

Spotted an error or want a tool we haven’t built? Let us know — these pages are updated as we test more setups.