I'm SO afraid I'm now going to have to go back & relive my last Betta fish's demise experience. I've had Blue now for 3 months got him May 26th at PetSmart same place I got my first betta Flash. I had had Flash approx. 4 months when he began his illness ending in his death in March. Now Blue is starting to act in much the same manner as Flash did. He's still in a 10 gallon Aqueon heated, filtered, live planted tank. I've been very careful NOT to over feed him, but something is NOT right. He's swimming in very "jerky" motions, staying mainly over to only one side of the tank & mainly at the top. -After he has swam a bit kinda of frantically he sort of pants. I do pwc every 7-12 days about 45-55%. He has one tank mate (large Mystery snail) that he's been w/since the beginning that he seems crazy about - wraps himself around Finn and literally "snuggles" w/ him. Blue has also been wrapping himself around the heater & intake apparatus that hangs down from my filter. Flash never did that. I waited 2 1/2 months after doing a thorough cleaning on my tank to get Blue after Flash passed away. I do API water testing about every other day that have been indicating good parameters. I feed Fluval Bug Bites/New Life Spectrum Betta Pellets - small/HikarI tropical micro pellets/ occasional frozen brine shrimp and blood worms (just as treats) No flakes. Water temp on one side of tank is consistently 79.7 degrees (the side he mainly stays on) but the opposite side runs 78.4 degrees. Please can anyone tell me if I'm just being an obsessive "worry wort" or is this odd behaviour?