Hello,
I have a 20 gal long reef tank (30"x12"x12"), and I am currently using the 24"-36" Fluval marine and reef LED light 25000K 32 Watt on it (I can still return). I have a couple of clowns, a royal gramma, some CUC, a BTA, and a small hammer coral. The BTA and coral don't look so good at the...