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my button polyp colony hasn't been opening for the past few days. well...one half opens, the other hasn't been open for 3 days or so. my params are good, zero on all levels, and my other corals are doing fine. any ideas?
i have 96watt pc on a 15 gallon tall. could that be too intense for them? they were fine for the first few weeks and i didn't notice any bleaching or anything.