Betta Fish won't close his mouth
My boyfriend and I own a Betta fish named Neil, we recently noticed that he wouldn't close his mouth. It's been about 2 days now. He will still eat his pellet food buy won't eat the Brine Shrimp.
3 nights ago we tested the water and it was normal, but we did a water change last, unfortunately Neil stays at my boyfriend's place so I'm not 100% sure if it worked, but I read that an open or swollen mouth can be Columnaris and I was hoping if someone could tell me if it sounds the same. We did add some Aquarium Salt to the water 2 days before doing the water change.