Right now I'm running only my actinics for about 5 days now while battling a green hair alega problem. But normally I would run my (3) MH 230w 15k too. Do you think that has something to do with it hinding in the back??..I just purchased a RBTA last night from a fellow club member and he is doing GREAT ate the silverside that the GBTA didn't want. The GBTA and the RBTA both look great...I'm concern with the GBTA hinding in the back and not eating all week.