Planted Tank Guru
Join Date: Dec 2012
Location: Hot Springs Ar. 71901
Some plants feed entirely from the water. If you have none, it would not be in the "need" category. But all plants(Aquatic) can get ferts from the water and giving them access to them from any way they can get them, it is easier for them to feed.
I have heard the KH2PO4 can be overdosed to bad consequences...what I didn't hear.
You say/w EI fert %'s...if you are using the calculator to determine the amounts then
I see no reason to worry. As long as you follow the 50% per week water change.
I did not have many plants when I did this but I cut the recommended doses of EI light weekly down by 25% and saw no difference in plant growth.
The shortest distance between any two points is a straight line...in the opposite direction...