You can use Procaine Penicillin if that's all you have.
Amoxicillin may be better since it's not injected, you can order it online.
https://fishmoxfishflex.com/collect...-equivalent-aqua-amoxicillin-250-mg-100-count
Amoxicillin may be better since it's not injected, you can order it online.
https://fishmoxfishflex.com/collect...-equivalent-aqua-amoxicillin-250-mg-100-count