Hello people! I am new at this aquarium stuff, but I bought a fire eel ohh about 5 months ago. I love it to death, but today I noticed that his eyes have a cloudly/ milkly look too them. I swear they where never like that before. I did have an accedient with my tank while back. where a lot of debree got cought in the filter system and when I went to change one of the filter pads all of that debree came flying out and the PH went sky high to about 6.0. So after a hole filter system cleaning a lot of pads and once a week 25% water changed. I think I got everthing back to normal. Couple of days ago I tested the water and the PH was about 7.0, ammonia was 0ppm and the nitrite was between 0.25 and 0.50 ppm. I did another water change today. I am going to test the water in a couple of days and see what it is at. But what I am wanting to know on, is that normal for a eel that have that, or is it because of my accident, if so is there a way to cure him?