Okay here is the perdiciment....I am looking to buy a new tank and go heavily planted but I dont know which tank I want more....well I know which I want but the problem is that I'm going to build a Canopy with the screw-in CF...I've got four CF at 23w a piece...the problem now is that w/ a 30gal I will have just over 3wpg and with the 20gal long i will have a little 4.6wpg. The 20L would be perfect for many aspects but the 30gal would be so much better in that I could put much taller plants in it...is 4.6wpg too much or is the 3wpg too little for high light plants....I'm leaning more towards the 20L being that it is cheaper...Im just so torn...I'm going to be going with Eco-Complete as the Substrate and the lighting is pretty much done with the plans for it. SOMEONE HELP ME DECIDE