My concentration stays at about 50 mg/l and I have similar problems... Mostly with the fastest growing plants (Heterenthera and Limnophyla) ! Tom spoke about 25 mg/l as a good value...
Hello again
Sorry, I knew I forgot all the details. Yes, potassium is going into the tank too (as a preparation of K2SO4 at, if my calculation are correct, I add enough to get a concentration of 10ml/l K per week. Should I be adding more? I have 2 lights on the 30 gallon tank (2x38w tubes). Let me know if more info is needed.
Chris
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