My brothers office closed due to covid and I ended up with these beautiful Betta fish on my hands. the first thing I did was move them to a bigger environment , I admit I am still working on it but this red guy is either a really picky eater or I worry that he has fin rot (from what I read). Iām no fish expert and Iād really love some help on figuring out if heās okay and if not what I can do to help him.