32 gallon biocube setup mid-January. Have had a couple clowns for a bit over a month, a cleaner shrimp and added a flame angel ~2 weeks ago. Everyone eating fine, clowns not paired but were hanging together off and on. Came down this am to find we lost the angel overnight (found him against power head) and then I come home this afternoon to find one of the clowns the same against the power head beside intakes, so 2 fish in 24hrs against the side of power head, tunze 6020 turbelle nanostream. Is it the power head???(Did I jinx it wanting AI Nero’s for some auto control). Readings look clean. What do I do? Advice/thoughts?