Your phosphates and nitrates are a little on the high side for SPS. Are you running GFO in your phosphate reactor? Would expect it to be lower if you are.
I have 2 tanks. In one I run bio pellets, GFO and Carbon in reactors. N03 is zero and P04 near zero. SPS and other corals, all do great.
The other tank has no reactors, just a filter sock and skimmer in my sump. N03 is around 20 while P04 is at .59 (just tested it yesterday). LPS and softies all do well, but I don't have any SPS in this one. I don't think SPS would like my high phosphates.
Are there any pests like AEFW (heaven forbid) that might be killing your acros?
You might also consider a bio pellet reactor if you have exhausted all other means of getting your N03 down. And you might want to look at your phosphate reactor to see why your P04 isn't lower.
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