I have a 55 gal tank that has been running for close to two years. My LTA was added maybe about a month and a half ago. He was eating very well and hosting one of my Domino Damsels. Suddenly he curled up and started excreting a lot of waste. He would open up for small intervals of time randomly but this morning he was completely curled up. Tentacles completely pulled in, only visible part is his foot. I can try to get a picture but because of his placement he isn’t very visible. I can only see him in tank reflection on back glass.