Lowering KH in a bee tank: coordinate water and substrate
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In an intentionally soft, acidic bee or Taiwan bee system, replacement water needs to fit the chosen substrate. This is not a reason to lower KH for every Caridina: Amano and Sulawesi are different cases.
Check what enters the tank
- Measure KH in RO water before and after mineralizing. Check that you are actually using the intended GH product.
- Compare it with aquarium KH. A difference calls for checking other water sources, stones, shells or substrate.
- Read the substrate manufacturer’s instructions. Record how pH and KH change after water changes; age alone does not establish exhaustion.
Prepare replacement water with the intended GH and KH outside the tank. When KH alone is unsuitable and animals are not in acute distress, change the existing conditions gradually while monitoring pH and temperature too. Do not dose acid directly to force a reading to zero.
If rebuilding seems necessary
When water preparation and substrate consistently support different aims, plan the transition first. Keep established filtration and suitable accommodation available for the animals. New active substrate may have its own startup requirements; do not transfer shrimp immediately because the first KH test looks right.
Sources and scope
- SRAC 464: Interactions of pH, Carbon Dioxide, Alkalinity and Hardness
- SaltyShrimp: Bee Shrimp Mineral GH+
Measurement and preparation principles come from the cited sources. The investigation sequence is an editorial judgement. Fish farming, drinking-water or livestock figures are not established safe limits or treatments for dwarf shrimp. Product instructions apply to the named product.
