Well i just bought a 30 inch pc strip with a 65 watt bulb, a couple bags of eco complete, a piece of driftwood, etc, and now all i need is the tank and plants obviously. I was thinking of either the 20 gallon long (30x12x12) or the 29 gallon (30x12x17) i don't think i want the 37 because it is way to tall. so which should i get the 20 gallon long which is what i'm kind of leaning towards or the 29 gallon? I will have plenty of light if i get the 20 g and only a moderate amount of light if i get the 29, so that's another reason i'm leaning towards the 20.