I see I got on board--maybe I'm not so dumb afer all. I used to have two 75 gallon tanks -one with african chiclids and the other an Amazon tank with Angels, tetras and live plants--that was 15 years ago.. I now have a 7 gallon with live plant and whiite clouds. I want to get a 20 long with live plants, and good lighting. What's better-power compact or T5? the tank is only about 12" high.