I need some advice on what to do next. Our son's Betta has been sick. About 2 weeks ago I noticed that he was not swimming much anymore, as well as laying mostly on the bottom either a little sideways or just with his tail town. The moment he does not swim he will almost fall back down, tail first. Until about 8 days ago he was still eating. We put him in a smaller tank with a plant on the bottom. He mostly tries to rest on the plant so he does not have to swim far to come up for air. We fasted him for 3 days, he has not pooped for over a week now, nor has he touched any of his food. He does not even move anymore when we tried to feed him. He does swim around when he needs to but mostly he just likes to hang around on his plant or on the bottom of the tank (tail first). I have given him 2 epsom salt baths for about 30 minutes each 1tsb to 1 gallon which did not make a difference. Right now he is in a half gallon tank, and we added a product called Revive which we are supposed to do for at least 3 days with daily 100 % water changes. He is on day 2 and nothing has changed. No poop and not eating and swimming strange. He does not look bloated and we have also tried the pea which he would not touch. I also have to add that over the past several months he has lost some of his tail fins and the top fin. They are both still there but are pretty short.
I am worried, since he has not eaten for over a week/nor has he pooped. How long can he live without eating/pooping? What can we do next? Any other medications that we can use? I am confused by all the different types. Please help my son loves his little fish and we only had him for 1.5 years.
Dinaco our Betta is in a 2.5 gal Marineland tank. He used to have a filter but it broke several months ago. We do weekly 100% water changes, spring water with water conditioner, temp is around 76 degrees (we live in Florida, so no heater). But we do keep the light on in the evenings when it cools down a little. It usually stays around 74-76. We feed him the Gold pellets for Bettas