Hey that is great. I always thought a 20 gallon high was called a Mini Reef. I am in the process of turning my 50 into a FOWLR, and am concentrating my reef activities to my new 20 high. If we decide that a 20 is a nano, I will do my posts in here. BTW the 20 has 2x32W CSL Smartlamps and 2x13 lamps (one is a 10000K smartlamp, and the other is actinic), that gives lots of light. BTW in another post I have mentioned that those F32 ballasts you are using to overdrive your lamps are not really electronic ballasts. They are at best hybrid. From what I have seen you are not getting as much intensity from them as you think. I have a feeling it would be far better to go to Compact Fluorescent, and get the light you are paying for. Anyway my tank has 90W of CF lighting. At twice the lumens per watt than NO you can see that in reality I am getting about 9.5W per gallon. It seems to be lots, it looks really good.
