Listen to wolfy. He knows his EI dosing. I adapted one of his dosing schedules for my 75 gal High light tank and the plants are responding very well. Make sure your co2 is up to at least 30ppm with his schedule and you'll see great results.
FILSTAR Pimp #2
75 gal heavily planted,50/50 Black beauty,Eco-complete substrate, Pressurised CO2 with solenoid, ph controller, AB Reactor 1000, 330 watts 9325K GE PC lighting,Ehiem Liquidoser, 2-Filstar xp3 canisters.