Melafix and Pimafix are dangerous to labyrinth fish, and are about 10x the concentration of the one which is used on betta, Bettafix. But if you are VERY careful about the dosage, it might work to help clear up his fungal infection, if you have nothing else.He's been changing depths a little today so that seems good. Not eating yet but I don't think that's a surprise when you have 30 old pellets in a cup. I've seen people post about garlic but I've never tried. Pretty sure he has cotton fin disease or whatever it is. I can't afford medicine but have aquarium salt and melafix and pimafix but have seen these may not be best for a betta. Gonna see how he responds to clean water then if I have to may give him a watered down dose of melafix, but I'm open to suggestions. I'll post some more pics when I get home from work.
Thanks for the advice everyone. I've chose salt and water changes for now, that's what my gut told me so we shall seeFin&tail rot is a bacterial infection. It can look like fungus, but going on how poor the water in the cup was, I wouldn't be surprised if he got a bacterial issue. Are bettas ok with salt (sodium chloride)? If so, I'd add a tonic dose of 1sp per 1-3 gallons. This is a mild dose to help facilitate osmosis and also heal with wounds. Salt also helps with bacterial issues. Salt and daily WCs is what I'd do.
For fungus, I use Methylene blue baths or dabs. Baths if it's all over, swabs if it's only one area. Again, I'm not at all familiar with bettas, so make sure these methods are safe with bettas.