2 cats, 4 goldfish, 10 minnows, a dojo loach, 3 corys, a gecko, 5 bettas, 2 mollies, & a RL pleco
The other day I noticed this happened to one of my bettas in my 20 gallon sorority, this sounds gross but she looked like she had kind of exploded.... I didn’t think too much of it but I still didn’t know what it was. Then a couple days after that it happened again with another betta, and unfortunately she died. I did some research and it I saw many places saying that it could be an internal parasite or worms, and I heard somewhere else it could be aggression. Has anyone here experienced this or know what it could be? I have 2 bettas that survived, I separated them and one is still in the tank while the other is in a (heated and filtered) 5 gallon bucket. The one in the bucket is acting normal but the one in the tank is pretty lethargic, or at least more than normal. There’s a very small bit of ammonia, but only a tiny bit, and I’m gunna get rid of it with a water change later. Please help me figure out what this is.