Betta is Not Eating, and has Possible FIN ROT?? (pic inside)?

Aquarium salt cures finrot. Salt works wonders! 1tbsp per 5 gallons of water. Dont use table salt as it contains iodine. um..Try fish flakes? Or Daphnia (i think thats how u spell it) I dont think its fit rot becasue it would have white along the edges. But try salt, it helps either way.