Discus fry dieing. The eyes is bulge out.

[Fishlover.]

Hello everyone.
Let me know what is going on with my batch.
Every fry has the same, eyes is bulges out ,redness in head between eyes.
Fry 20 days old and 11 days keep dieing.I'm loosing 4-5 pcs. every day.
It's a internal bacterial infection i think.Erythromycin,kanamycin didn't help.
Thanks.
P.S.
Reposted this thread from discus sction.

 

[Fishlover.]

Has found a medicine. Works.

 

[Just Prince]

what medicine worked?

 

[q_fish]

do you do WC often? could be ammonia or sometihng in the water?

 

[Fishlover.]

WC 2 times a day on 90%-95% each time.
No amonia in water.