male Betta fish may have pop-eye

[dohaver]

I am a beginner. My male betta is cured from fin rot, but now his left eye is raised like a bubble. HELP, PLEASE. I have kept up with my water changes, his water is at 79 degrees. He is hiding, unless I shut the lights off. He is eating. I don't want to use betta-fix. Should I sart with Epsom salt? how much for a 2.5 gal. tank? Nitrite/nitrate in perfect normal range, ph 7.0 water is hard at 180, but has been. Tank cycled. I use equal portion of betta-water and poland springs. see attachment

 

[Demeter32]

It gets a little confusing when there are duplicate posts. I replied to your other thread a bit ago so you might want to check that out.

 

[fluttermoth]

As the other thread has more replies, I'll lock this one to keep everything in the same place