Please help my pet oscar!!!?

Question

he has brown spots all over him, like his scales are falling off and now they look like sores. i have never seen anything like this, what do i do, he doesnt seem sick, i know he's getting too big for his aquarium, could this be the reason?? the only other fish in there is a cleaner fish

Answer 1

it could be stress related. oscars do best in a tank of AT LEAST 55 gallons,  if not more. what kind of cleaner fish is it? plecos wont bother it and it would eat otos or flying foxes, if its a chinese algae eater, it may bully the oscar

Answer 2

Could the brown spots at one time been a yellow? I've found these two to help you out. Good luck.

Q:  My fish has small off-white to yellowish dots on the skin and scale edges.

A:  Your fish are affected by Oodinium.  

Treatment:  Use Acriflavine Neutral -or- Forma-Green -or- Copper Sulfate.

Q:  The scales on my fish are falling off.

A:  Sounds like the fish has Bacterial Hemorrhagic Septicemia.

Treatment:  Treat the fish with Oxytetracycline Hydrochloride Powder, for ten days.

Answer 3

Test your water or take it to a pet store and have them test it.  Without knowing your water parameters (ammonia, nitrite, nitrate, ph) it is very difficult to diagnose.  From the way you describe it it could be an extreme Ph burning him, or more likely an external bacterial infection, usually caused by poor water quality.  You will need an antibacterial treatment of some kind. You can find them at the local pet store, and the back of the boxes/bottles also help for diagnosing.  

I have had good luck in the past with a combination of Melafix and Primafix; they are less harsh than other treatments and usually knock out the problem if you get your water quality up to par.

Good Luck

this disease chart might help

http://fins.actwin.com/disease/chart1.ph...