I'm setting up a 29 gallon and wanted to make sure I will have enough light to grow moderately demanding plants. Currently, I have a 24" Coralife Aqualight (2X14 watts each). I know I need to supplement this, but I want to make sure I won't get any algae problems from over-lighting the tank. I'm considering picking up another Aqualight, but the 30" version (2x18 watts each) which would give me 64 watts of T5 normal output over the tank. ~2.2 wpg. Enough or too much? The tank will have C02 injection.