I purchased a 18 inch hi utsuri from my dealer and when I got it home I saw a sore inside its mouth. it looks like something took a chunk out of its bottom lip and thesore goes inside the mouth. I put my salt level up to 3 ppt and have been keeping a close eye on it it looks like its not getting any worse but I was wondering if there is anything else I should be doing. she is still eating and swimming around like normal I just don't want it to get any worse or cause any more problems