Mh Lamps?

DA Mini Reefs

New member
Anyone useing the new Aqamedic 13k lamps over Clams? Would 150wt. or 250wt. be better for a 4x18[high] tank? Mt sqamosa is doing fine under 1x 150wt. 10k at the moment. But I need to change the lamp soon. Or would it be a great benifit to upgrade to 2x 250wt. 13k lamps ?:)