Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
You probably will need to add some ferts, but maybe not much.
I can see several ways to do this:
1) EI, then test and adjust the dosing.
2) Start with no ferts, test and add a little, changing the dosing as you go.
3) Put some slow release tablets under the substrate and watch the plants.