i meant my it as a question as is this possible or common. ? lol i read it again and laughed.. but ya i do regular water changes but will 4 sure buy a test
Well, yes. Pop-eye, and for that matter, most fish "diseases," are caused by poor water quality. So you need to test your water. It is most definitely the cause. And the reason I stated this is because most Oscars don't have bulging eyes. It is almost always related to water quality.