You are going to have to dose NPK with that light and co2 setup. The T-5s alone put you in the high light range. Here are the ranges that are suggested:
Phosphates 1.0-2.0 ppm
Potassium 10-20 ppm
Look up some info on EI dosing. After failing at planted aquariums for 8 years I have finally come to a place where I have, at least for now, defeated problem algaes. It has been done primarily by keeping my NPK where it needs to be.