I have been looking pretty heavily at making my own lighting for a new 75 gallon tank I just got. I'm debating whether to make an LED fixture or use MH lamps. I am wondering what the light output need would be for a standard sized 75 gallon (I realize LED and MH are different so whichever you guys know more about, please fill me in!). I would like to ensure that I can care for SPS corals adequately (the tank is 21" deep). Also, I am planning on hanging them 6 - 8 inches above the tank if ...
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