Just a warning for those of you with cats. I used a feliway diffuser in the same room as my tank and lost a lot of corals. Its possible the problem wasn’t from the diffuser, but I couldn’t identify anything else. Once I unplugged the diffuser, the corals that were still alive stopped getting worse. They’re slowly coming back now. It was super depressing to loose so many corals that I’ve spent years saving for and accumulating. My tank looks quite empty and drab now, no fun to look at, and I’d like to prevent anyone else from going through the same problem.