Hey guys! Haven't posted in a while but here I go. This is my current 5 gallon betta Tank. Comet, my twin tail half moon betta lives in a 5 gallon tank. But, I was not home for a bit and had my mom "watch" the tank. In that time, my Bettas fins started shortening and the tank got nasty. I cleaned it today and did a 50% water change, and plan on doing so daily for a week and then going to a 25% daily. I got him some brine shrimp (freeze dried) and some better pellets so he can hopefully grow his fins back. My fear is the damage may already be done . What do you guys think? P.S that neon tetra in there is only there temporarily until I find him a bigger tank with more neon tetras, I saved the little guy from a bad tank and he does not bother the betta and the betta does not bother him.