Ok I have an old pill bottle with 10 amoxicillin with each tablet being 875 MG.
If it is any help, the bottle was filled 04/30/2013
Can these be of any help? If so I'll move him to me 20 gallon quarantine and move the inhabitants somewhere else. I'm 99.9% sure they are good to go and I'm 99.9% sure my sun cat will die if I don't do anything.
I found two papers saying that amoxicillin is effective against Columnaris but it's related to erythromycin and really better for Gram positive infections. Columnaris and most fish infections are Gram negative. Is the fish still eating? I've only found references to amoxicillin being put in food or injected, not as a bath. Some drugs only work when administered a certain way.