i have seen metal halides at home depot for less than $40 for every thing. why is it so much more at fish stores. and is there any diffrence. if not than i want to go ahead and buy a light.
so if my lights go on at 3pm and shut off at 12am. can I run a 5.5k bulb when im not there so the corals get a boost of growth? like say 11am to 2:45pm??Geoff said:a 5.5K bulb will give you incredible coral growth, but it will be one yellow tank.