The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
My tang has a "big belly". Not sure if that is the correct name or location, but I just noticed the bulge. Is this normal after eating or is something wrong with him?
Are you feeding freeze dried foods? That can cause this such things in some fish.
Either way, I'd assume constipation in your fish. Keep an eye on it and what your tang is eating.
Have you had this fish for years? Don't make a change on something that has worked for years on what is an assumption on my end. I'm a frozen food and seaweed guy, but that doesn't mean it is right.