How much K2S04 if not dosing KN03
If my tank is 30 Gal and according to EI method
i should dose
1/4 Tsp-KN03 3x a week
1/16 Tsp-KH2P04 3x aweek
1/2 Tsp-GH booster once a week
5ml or 1/16Tsp-Trace 3x a week
but if my nitrate levels is already high for any reason, How much i should dose K2S04 to reach the right level of the (K) Potassium ?