So today I was feeding my coral when I saw my gramma dead stuck to a pump. Just two days earlier he was swimming and eating healthy. He had no visible parasites and no bloating or any signs of unhealthyness. All my water tested good. Ph was a bit low but everything else was ok. Ph was at 7.8 or 7.9. All my other fish and coral are healthy and doing great. Is there anything I did wrong? Was there anything I could’ve done to save him? I did not see him yesterday, but I thought He was just in his cave ever since then I just haven’t seen him. Like I said, he was just found dead on a pump. Any one know why this could be? Thankyou all in advance.