HELP!!!!! My Xenia i just bought a couple of days ago is now shrinking and losing it's symbiotic algae. I researched it and it sound like coral bleaching. It's caused by overheating usually. So i checked my tank and its at like 86 my therm. says. I don't think my therm. works it's one of those strip ones. I've had my heater for about 2 years. IT's a 200 watt heater. I took it out for now to see if it cools down. Will my xenia die.