I had a previous Betta who lived a full 6 months before suddenly going off his chow and passing away. I reviewed everything I did and could not find an answer as to why. He started life in a 0.5 gallon Betta "condominium" and was upgraded to an Eclipse 3 (top filtration) unit about a month after I got him on advice from my local pet store.
He seemed perfectly happy in the bigger acquarium, so I have no qualms about the type of tank. He absolutely loved playing in the waterflow from the Eclipse filter. No rhyme, no reason as to why he perished.
So now I have a new Betta. He is much smaller (possibly much younger) and very physical in his swimming. I thoroughly cleaned out the Eclipse 3 (hot water, no chemicals) and he seems to have a lot of fun swimming around the tank.
My only problem is that he does not seem to want to eat Betta Bites. When I brought him home on the weekend, I fed him freeze dried bloodworms, as I had done with my previous Betta and he seemed to enjoy those, although the current made them a bit hard to manage for the new guy. Betta Bites on weekdays, Bloodworms for a treat on weekends. Now, he will take a Betta Bite in his mouth, chew a bit, then spit it out. No interest whatsoever, although it has only been one day.
Should I be starting him out in my 0.5 gallon Betta condo and then gradually moving him up to the 3 gallon in a few weeks? Or should I just give in and feed him bloodworms for awhile?