My oscar has been sick for 2 weeks now. I fed him like 6 feeders one day and then he laid on the bottom of the tank ever since. Then one of his eyes turned cloudy white now it is red like its bloodshot, and he just looks nasty, theres a slit above his top lip and hes swimming sideways in circles like a dog chassing his tail. I have him and a small pacu in a 55 gallon tank, the tank started turning white and nasty so i did all i could do for now.... I had only one empty tank- a 30 gallon half full from a couple weeks ago, i put him in there with some stress coat, ick medicine(all i had) and a tablespoon of TABLE salt(desperate dumb last measure) When i put him in after 20 minutes he went nuts and flew from side of glass to the next and jumped a half foot out of the water. I feel bad but i didnt want him spreading disease to my pacu and pleco which there tank i had to remove half of the gravel and do a 60% water change and clean filters. What should i do is my oscar a goner?What does he have?