Hey guys my Indo Datnoid has recently developed a red throat and mouth. from the bottom of throat up to about the eye. I don't have water parameters. I can tell you the fish is acting as normal: eating and not overly breathing hard. I do 50 percent water changes on his 100 gallon tank religiously weekly. He is about 4in and has always eaten a diet of freeze dried krill and blood worms. I have attached pictures, they aren't the best but you can see the redness. Anyone ever seen anything like this?