My betta is swimming around happily and has a healthy appetite, but im worried about his fins. What does fin rot really look like? Does your fish act differently? He has a clear ring around his caudal fin, but i think that may just be natural. He also has a tiny tear on his caudal, im not sure if its new, or if i just didnt notice it before since hes a new fish (Its only noticable when he flares). Help?