Yesterday we went and bought a T5 HO , we put dual 24'' over it. Total wattage is 48w. That puts me at 1.6 WPG. The plants in it are java fern, anubis and giant hygrophila. This is a good increase from the single 25w we had before. Our tank is a 30g. The problem is we could have bought a dual 36" that would put us at 2.6 wpg. But then we would've probably had to get into pressurized CO2, which is expensive. Now we can make a diy co2 injector. My question i guess is do you think this is enough light for the plants? It's also got fish (assorted tetras and others) and I don't want the plants to start taking carbon from my kh buffer. Which i read can happen if you don't have enough co2 to go with your light. I'm not trying to grow a planted miracle but i'm just trying to keep my plants and fish healthy and flourishing. any opinions would be great as i'm fairly new to the added carbon and super light subject, though i've had plants in my aquariums for years that did fine without extras.