I have a minimal clean up crew I plan to get 500 dwarf certh snails in addition to the hermits I have.

I'm not overfeeding because there isn't really anything in the tank at this point.

I have a 1300gph in the tank in addition to the returns.

TDS? I have no way to test phosphates at the moment what is a good way to keep them down?. Nitrates are looking good.