Planted Tank Guru
Join Date: Feb 2010
Location: Newbury Park, CA
All are necessary. Different plants in differing situations probably need differing amounts. Choose one, see how you like it. Next time try a different solution.
The aquarium isn't just getting micros from the solution you choose to put into the tank. The water source and the substrate and probably decomposing waste and plants provide some as well. Check the water report for your tap water, see if you can find an analysis of the substrate you use as well. I know my tap water has calcium, sulfur, boron, vanadium, potassium and magnesium in it.