Koi Ulcer

I have a 14 year old ghost carp with a swelling on his side near his rear fin also now his scales seem swollen and redness under the scales can anyone help me how to treat him???? -Liz Your Koi probably has an ulcer. Ulcers are caused by the bacterias Aeromonas and Pseudomonas. There are two ways to treat an ulcer, injections with antibiotics or a Tricide-Neo dip if you don't like needles. Consult a local veterinarian that specializes in Koi health on the best course of action. Share: Del.icio.us Digg Reddit