When I bought my oscar fish, the fin along its back looked thin in a spot towards the middle top end. now theres a quarter inch hole in the fin and it looks a little thin in another spot. He looks and acts healthy other than that. What should I do? Is this normal wear or should I be worried? Also, I have another Oscar that is absolutly beautiful but when I got him home I noticed he has a gimpy eye. One eye is normal but the other is really small and mis-shapen. He swims a little catywompus but he seems healthy and is active, Will this be a problem in the future? I like him and didnt want to take him back because he has attitude and I really like his personality. Thanks for any input...