This is Stanley. He is a halfmoon mustard gas betta. He has a blue body and yellow fins with blue on the edges. Recently I noticed a little tear on his caudal fin. It turned red so I started cleaning his tank everyday because I didn't want him to get fin rot. Then I've noticed lately that his anal fin is looking a bit scraggly (dorsal fin too) so I took out all the rocks and decorations just in case they were causing the scraggliness. Also his caudal fin has had a red spot on the tip, but it went away when I started cleaning the tank everyday. Once the redness subsided I started cleaning it every other day and then I noticed the redness came back! Grr. Other than his fins, he completely normal.
Right now I clean his tank everyday and use stress coat. What else should I do? I know fin rot is something simple to treat, but I would greatly appreciate some advice.