So I've been experiencing a few issues lately, few things potentially could have caused the stress in my tank(new LEDs, new fuge, new PH, new heater) I was just wondering if someone could further explain the threats that leather corals pose to other species in the tank. I've picked up bits and pieces of information saying that when they shed their slime coats, they cause the water in the tank to become toxic to most stoney corals. Currently the leathers in my tank are a devils hand, kenya tree, green mushroom, green star polyps, yellow polyps, and xenia sp. I moved my leathers into the fuge where they are getting lower flow and less lighting, so far they seem much happier down there I've had a few of my stoneys appear to have suffered tissue loss either due to constant direct flow from placing new PH and leaving to work for 7 hours. Other frags of stoneys in my tank are looking better than ever, so it's hard to know what caused this. Just wanting to see if someone could shed some light on this subject for me and any future 3reef members searching the same topic.