I've had my male Betta for a week now (he lives on his own and no sharp objects in my tank). I've checked my waters every day with API master kit and the ammonia etc is 0. I use Prime conditioner and I've done water changes.
But I've noticed he has what looks like red sores on him, maybe he had them at the beginning but I don't think he did. He seems happy, swimming about, sleeping at night, started making a bubble nest the other day, eats his pellets (every other day I feed him)
Could someone please see from the images I've uploaded in the link below if there is an issue with him? He's my first fish and only tank.