I've had my male Half Moon Betta now for about 7 months and he's been doing very well. At first he wouldn't eat but that's a thing of the past. I do weekly water changes and everything has been testing out great. I did a water change this past Saturday and since then he has been acting differently. I feed him freeze dried blood worms and normally he is very aggressive towards them. He lunges at them like there going somewhere. Well the past few nights he's been having a hard time getting them. He'll stare at them for about ten seconds then attack it but misses most of the time. I did another water change Wednesday night to see if that would help but it didn't really make a difference. He also seems very erratic with his movements. Tonight I'm going to add a few drops of Rid-Ich to see if that does anything. There's no visible parasites, fin loss, hazy eyes or anything like that. Does anyone know what could possibly be the problem? Any help is greatly appreciated.