My girlfriend and I decided to get a betta in February, being ignorant people, we assumed wrongly that bettas could live in bowls and did not need a heater and filter etc. We started doing research immediately after we started noticing our poor betta get clamped fin, needless to say we went out and got every amenity possible to treat our betta and keep him healthy. The clamped fin has finally gone away and our fish seems to be very happy and making bubble nests in his tank. I am asking this because, 1.) some of the fins split upon him reopening them, and 2.) a small amount of fin rot has occurred. I am worried that it may continue and am hoping that he has fought off the bacteria, however, I am curious if we should setup a quarantine tank and get him rolling with salt treatment, or if he is okay.
(The fish in the avatar is our second fish, very healthy and without any diseases.)