Originally posted by mersonly1
would 2 400 watt metalhalides be to much for a 75 gallon reef tank?
No way!!! You can never have enough light. I am assuming you are going with radiums. That will look very nice and I think you will be happy with the growth. Judging by the light I would assume you are going for a sps tank? If so, I would suggest a calcium rxtr for that size of a tank, it would get very expensive to dose the 2 part addtives to that size tank.