Zebra Danio Sick

[jimw13uk]

I have a couple of zebra danios - 1 of them has a large swollen eye which is now bright red as well. This has only happened over the last 24/36 hours and he's eating and swimming round fine but his eye has definitely gotten more swollen since yesterday.

Any ideas to what it is and if there is anything I can do to help him out.

 

[The-Wolf]

sounds like a case of popeye disease
http/www.aquariumpharm.com/disease/popeye.html