Originally Posted by Vikki81207
So I've been treating her with Melafix since the day I started this thread and it doesn't look like it's made a difference. It's just a little swollen and cloudyish. I was wondering if maybe she got a cataract and went blind in that eye? I just haven't noticed anything different. Should I try to get a pic?
I took a finfish health course last year and learned about this disorder (maybe I can help??), one of the common reasons for it is environmental.
Pop eye (exophthalmia) can be caused by excess nitrogen and sometimes other gases in your water, measuring ammonia is great, but nitrogen should be a concern as well. Too much nitrogen can cause gas bubbles to form behind the eye causing it to pop out. It is also the cause of gas bubble disease in fish. If you notice any small bubbles on your fishes body, you should change the water often to get rid of excess nitrogen.
There are some physics involved, you probably have learned before that if your water temperature is cooler it can hold more gases; however, if your temperature rises too fast these gases tend to dissolve out of the water quickly into the atmosphere where there is less gas, but there is also less of this gas in the tissues or blood of a fish! which can cause trouble in respiration and bubbles within a fishes tissues.
Now with that said it CAN also be caused by bacteria...or perhaps another disorder which prevents a fish form having poor gas exchange due to internal causes (not sure if that can be helped)
Overall I would recommend frequent water changes with your treatments, as I cannot be sure if you have a nitrogen or bacterial problem or perhaps even both.
I hope this kind of helps, I just remember some of Arctic Charr broodstock had some SERIOUS popeye it's not very nice is it :(
Reference: Textbook of Fish Health by Dr. George Post