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Re: water chemistry/new tank
Nitrate is of small concern if you have ANY nitrite and ammonia in your water. When you have fish in your tank, and ANY ammonia and nitrite (however small the amounts of these 2 compounds are), you need to perform about 50% DAILY water changes to be removing the accumulating nitrite and ammonia, UNTIL they both = 0. Even smallest amounts of ammonia and nitrite CAN kill your fish or make them very sick. If you had no fish in your tank, you wouldn't need that many and that large water changes, but if you want to increase the chances of your fish surviving, go for the water changes until ammonia = 0 and nitrite = 0.
I am assuming your tank is still cycling.
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