I had my betta is a ten gallon tank (which I also keep my krib fry in as they are growing out). I feed them twice daily ( a mixture of crushed up Tetra Pro Crisps, freeze dried bloodworm and fry bites) and my betta really hogged out all the time. So much so, that he developed a strange "cyst" on his left side. His right side looks a bit swollen too, but it is mostly on his left side. I was afraid that this diet wasn't good for him and that he was over-eating, and probably the nutritional requirements weren't optimum for an adult betta, so I moved him into the 55 gallon tank a week ago. His cyst still hasn't gone down, tho, in fact it slowly gets worse every day.
I don't really see the trademark "pine cone" effect that usually indicates dropsy, just a clear cyst that you can see right though.
He is still eating great, acting completely normal and otherwise seems healthy. In fact he is really fitting in well in the 55 gallon tank and he doesn't bother any other fish and the others don't bother him. He just swims around in what must seem like an ocean after being in a five gallon then to the ten gallon tanks.
Here's a couple pictures:
Does this look like dropsy, or something else?
I don't really see the trademark "pine cone" effect that usually indicates dropsy, just a clear cyst that you can see right though.
He is still eating great, acting completely normal and otherwise seems healthy. In fact he is really fitting in well in the 55 gallon tank and he doesn't bother any other fish and the others don't bother him. He just swims around in what must seem like an ocean after being in a five gallon then to the ten gallon tanks.
Here's a couple pictures:
Does this look like dropsy, or something else?
Heres a site to help u. 
