Planted Tank Guru
Join Date: Nov 2009
Location: Missouri united states
Given that most,or many aquatic plants in the wild maybe do not grow completely submerged, do not like being completely submerged,and have near unlimited access to 300 to 400 pm CO2 from atmosphere,I do not think a measley 20 ppm or 120ppm(doubt this) we might be able to provide, is gonna hurt the plants any.
OP says they are dosing EI twice a week.This is not EI dosing.
EI is a method of providing nutrient's ,not a brand of fertilizer or said nutrient's.