I bought this corydora about a week ago and soon after putting him in the tank a noticed a small spot white in color that looked like missing skin. I assumed it was just some he lost in transport or something like that and i just thought it would go away. But after about a week it hasn't gotten any better and i think its gotten a little bigger even. (Spot doesn't look fuzzy at all). Besides the spot the fish seems to be acting normal and look healthy. Thanks!