I've had Knight for a little over a month now. When I got him he had swim bladder disease but that went away after the recommended treatment (about 4 weeks free now).
He's in a 10 gal. filtered tank, kept at around 78 deg, give or take 2 deg every now and then. I change 10% every Saturday and vacuum once every two weeks (due again this coming weekend). I've been feeding him Aqueon color enhancing betta pellets (3-5 twice a day) and 5 blood worms at one feeding twice a week. (also Aqueon brand) I use An Aqueon conditioner for large tanks, and Algaefix once a week as the bottle directs to prevent the fate of my last 2 fish. None of the water parameters have changed, and are all at stable levels... pH: 8, Ammonia and Nitrites are at 0 ppm and Nitrates are at 18 ppm... but he won't eat.
He just hides from me and everything else. occasionally I see him swim out from behind the filter or his castle, and when I open the tank to put in a pellet and see if he'll eat he either hides or stares at the pellet till it sinks and then runs away. He does this with blood worms until I take them out. This has been going on for 2 days now.
He ate regular in the morning the day it started and that night he wouldn't eat, I figured he was grumpy, but now he still won't eat.
I've never had this with a betta but I did with a goldfish and he refused to eat for an entire week before he died.
I'm worried about Knight, has anyone else had a fish refuse to eat before? His physical appearance hasn't changed and his behavior is the same except for the eating thing. He still chirps at me around feeding time, but then he won't eat.... I don't know if there's something wrong or if he's just ornery... I have changed nothing and I'm beginning to wonder if he just doesn't like this food anymore... there are no tank mates so I know that's not what's keeping him from eating...
Oh and, all his plants are silk and I have 2 "homemade" caves and a plastic sandcastle that passed the nylon test, a heater, thermometer, and filter that are all still in working order and doing their jobs. he still swims around so I know the current isn't too strong and he goes everywhere so I don't think it's swim bladder again...
PLEASE HELP... I'm worried.... :(