Shrimp tank water changes
Shrimp tank water changes without chasing a calendar
Plan shrimp tank water changes from readings, feeding, recent care, and colony behavior, with TDS planning for Caridina, RO water, and remineralized setups.
Last updated May 25, 2026.
Short answer
There is no universal shrimp tank water change schedule. A stable mature Neocaridina tank, a heavily fed colony, a new setup, and a soft-water Caridina tank can all need different rhythms. Shrimp Tank keeps water changes, readings, notes, and colony history connected so the pattern is easier to see.
What to check first
- Ammonia, nitrite, nitrate, GH, KH, pH, temperature, and TDS if you use it.
- Feeding, top-offs, filter cleaning, substrate disturbance, livestock additions, and plant trimming.
- Colony behavior, molts, losses, berried females, shrimplets, and unusual hiding.
- Replacement water source, conditioner, remineralizer, and prepared-water readings when relevant.
Neocaridina and TDS
If you keep Neocaridina in a stable tap-water setup, start with ammonia, nitrite, nitrate, GH, KH, pH, feeding, and what changed recently. TDS can be a useful trend marker, but it should not replace those tests or push you into changing water just because one number moved.
Caridina and prepared water
If you keep Caridina, use RO water, use active substrate, or remineralize water, TDS planning can help prepare replacement water more consistently. Even there, it works best beside GH, KH, pH, source water, substrate age, and tank history.