Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
Buy these separately:
GH booster only if needed.
Dose this way:
If the NO3 from fertilizer is getting too high, then back off on the KNO3 and use K2SO4 instead. The plants will still need the potassium.
Fish food supplies a fair amount of N, P, and most traces. If the NO3 is high from fish food, then reduce dosing N, P, and traces.
Fish food is low in K, Fe, Ca and Mg. If the NO3 is high from fish food you might only need to dose K and Fe from fertilizer, and make sure the water supplies enough Ca and Mg. If the GH is over 3 German degrees of hardness then the Ca and Mg is probably OK.