Yes, that's my temp swing. The MH heat things up, during the day. I have had some higher temps over the last couple of weeks, because of the summer heat. Temps of a high as 84.5 a few days, but am trying to keep that at a more even level. I will try to raise my cal and mag. The mag seems to be the tricky one to keep at a more even level. Still very depressing to see whole colonies die in a couple of days. I think in the future, i'll acclimatize my larger, more costly, pieces of corals. Just to try to give them the best chanced at surviving.
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