Hey! About a month ago I've stopped doing 100% water changes, in which I would put my betta in a smaller container and clean his entire tank and put him back, realizing it is dangerous. Ever since then I was sort of lost about what to do next. Fianlly it has come to the situation in which I change about 10%-25% daily. I stopped for a few days with the changes and Felix didn't seem to mind, but after I did another 10% he started developing fin rot, and I don't know if it's because I change too much water or too little! I bought an aquarium siphon (an expensive one
) and apparently it's too big for my tank. I don't know what to currently do with Felix! Should I change more water to prevent fin rot or could the constant water changes be the reason for the fin rot?
I thought about using sand instead of gravel in the tank, so that I could collect dirt from the bottom. Will it work? Thanks for the help!!