@coral reeftank just got me thinking more. A couple years ago when sps started dying off. It was unexplainable to me. Nothing changed fundamentally. I sent off icp tests - no issues, even sent an aquabiomics test - no issue or pathogens and actually tested very well in the 80th percentile and as a mature Reef, lights and pumps were also the same. Ever since I’ve had large anemones, sps have never done well. My other tank without an anemone, no issue