I have 5 false julii cories in my 40 gallon breeder; one of the cories got caught in the ladder of the hagan CO2 system that I have in the tank. I have no idea how long he had been in there, but I don't think it was too long as the tank is in our living room and I look at it every time I walk past. I moved the ladder and he swam out and I have watched him and he seems to be acting normally but he has a small cut on one of his sides. I am wondering if I need to isolate/medicate or if he will heal without intervention. Water parameters as follows: Temp-75, Ammo-0, nitrite-0, nitrate-20, and I do water changes of about 40% weekly. Thanks!