Approx. 2 minutes read
KH, or carbonate hardness/alkalinity, helps buffer pH. Raising KH can be useful in some Neocaridina setups, but many Caridina bee-shrimp setups are intentionally kept with very low KH. Identify the shrimp first, then test before adjusting.
Before Raising KH
- Test KH, GH, pH, TDS, ammonia, nitrite, nitrate, and temperature.
- Compare the tank with the Shrimp Parameter Cheat Sheet, Neocaridina shrimp care guide, and Caridina shrimp care guide.
- Prepare adjusted water outside the aquarium when possible.
- Avoid chasing pH by adding buffers without understanding KH.
Source-Backed Options
Commercial alkalinity buffers should be used according to their labels; Seachem Alkaline Buffer is labeled to raise alkalinity/KH. Shrimp GH/KH remineralizers are another option when starting with RO, rain, or demineralized water and the shrimp species needs both GH and KH. Crushed coral, limestone, and dolomite can raise hardness and alkalinity slowly, but they are less precise than preparing replacement water.
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Emergency Recipes Removed
This article no longer gives a baking-soda recipe for active shrimp tanks. Sodium bicarbonate can raise alkalinity, but fast changes can move pH and stress shrimp. If you use a buffer, use a measured product label, test frequently, and make changes gradually.
Next Step
Use this KH article with the Shrimp Parameter Cheat Sheet. Compare Neocaridina shrimp care guide and Caridina shrimp care guide from the Freshwater Shrimp Keeping hub before adjusting a shrimp tank.
Sources used: USGS water hardness, UF/IFAS alkalinity and hardness, Seachem Equilibrium label, Seachem Alkaline Buffer label, Seachem Acid Buffer label, SaltyShrimp Bee Shrimp Mineral GH+ label, and SaltyShrimp Shrimp Mineral GH/KH+ label.