he was making a nest for a few days and was trying to get a female to come over .. he finally got a female and a few hours later he blew up like he had bloat his color faded and he was struggling to stay a float and a few minutes later he got real bad and was stuck to the pick up tube so it was either bloat or maybe he was blocked with gravel. I rescued him from a bad home about 5 weeks before .. he had fin rot when i got him and his tail was coming back . I mean he was an amazing fish and was doing great. and in 15 minutes it all changed .