Planted Tank Guru
Join Date: Sep 2006
Location: Northern California
Actually, I don't think that much light is too bad. I'd estimate 50 watts are getting into your tank.
Clado algae isn't controlled by fertilizers or lighting. It's controlled by manual removal, Amano shrimp control (which helps, but isn't the cure), and by Excel/H2O2 overdoses.
I'd keep the lighting you have on your tank...BUT I would either try an Excel/H2O2 overdose for a week or two, and if that doesn't work, nuke your tank.
You have pressurized CO2 and EI ferts. Say you only lose 30% due to restrike. That's about 5 WPG getting into your tank....that's not un-managable. The problem is that everyone assumes clado "spontaneously" comes about from poor light, CO2 management, and fertilization...it's really not. It comes as a hitckhiker and there are other means to get rid of it.
Bottom line: Keep your lights. Keep your CO2 where it is, keep dosing EI. Excel/H2O2 overdose, nuke your tank if all else fails.