I've already gone through 3wks of acclimation.
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all the brief somewhat unhelpful info I found was "Moderate" lighting. No par ranges. So its possible it was a bit overdosed w light if anything.Lighting changes can take a long long time to see and a long long time to turn around. I seriously doubt that insufficient lighting is the issue unless your fixture is bad. If your chemistry is as you say than lighting is the next choice. You could always send your water to Triton and get a run down. I doubt you're starving the coral and you know what corals can go next to which so that is not the issue.
To rule out allelopathy.Why for?
Find a spot with about 100 par and see what happens.

