So I currently have my betta fish in a 3.5 gallon heated, filtered, and cycled tank with two ghost shrimp that I recently added and I noticed that my betta fish has begun to swell under his gills. There is slight pineconing because of the swelling and I don't know what to do. Is this dropsy? What do I do? Is this because of the shrimp that I added? I tried to get as little of the LFS water in the tank as possible but that could be it I put the shrimp in the tank using a net, I didn't pour them in. Please help guys. I am so worried.