Interesting thread, has me thinking. I ran a 2 bulb T5 unit and supplemented with LEDs. I had amazing coral growth with this combo, great colors (no sps), to the point that my corals were too big for the tank. I moved to Radions on my 180 and have lost every single one of my first three corals. Not to bleaching or anything, not exactly sure why they died. some corals have done amazingly well, others, not so much. I do know I am not seeing the same success on the 180 to what I saw in the 55. Is it lights, is it maintenance, not sure, but definitely something to think about.
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