Ok, with this christmas coming up, i'm thinking of going a little bit bigger from my 20g tank. What size should i jump up to next, 29 or 40g. And lastly, i'm using CF light on my 20g and I want to grow sps, on my next tank, what kind of lighting should I use for a 29g or 40g with out going all out on those high priced crazy lighting system. my budget on the light is around $200. Can someone give me some insight of what i should do? Thanks