Eye looks popped out
 

Last week I changed everything in my betta's tank. I came to work today and one of them has an eye that looks like it is popping out of the socket. I changed some of the water and gave them some medicine. Any thing else I can do?

Sounds like popeye, a viral infection of the eye. There are meds available at your lfs to treat this infection. I have been in this hobby for many years and still can't get which med to use for which infection. An ametuer fishkeeper I am. A specialist on fishy diseases, I am also an ametuer. I am blessed with great lfs's, they tell me what I need for any malady and I buy it. Maybe I should learn more, huh?

I bought Ampicillan
 

I was surfing the web and this is what I came up with. Hope it helps.