i got a oscar for my 75, its 3-4" and im having some problems. when i first put him in, he hid all day, except for when i feed him,then he came out and ate, but now he hides all day and i think he has ick. little white dots all over him, i tried to move him into a 10 to heal him but i couldnt catch him. now he hides all the time. i tried feeding him but he doesnt come out. when every i try and catch him again he hides in the piece of driftwood i have. so i added salt to the tank, i ran out and only had enough for 30 gallons, im going to get more, and the temp in my tank is 84. should i raise the temp more? btw all the other fish in the tank are ick free idk whats going on. every time i get an oscar it doesnt do good.