i bought two oscar from petsmart one came down with ich now the other has it too. i have been treating them since i seen the first one came down with ich. what is the fastest way to treat ich? And what causes ich in the first place when i first got them they seem health no signs of stress or white dot or nothing. help please!!!!

Here ya go read this: www.oscarfishlover.com/helpful-articles/whitespot

Heat + Salt is what you need to do.

That thread has you covered.

if you are sure it is an ich or ick, you had been covered....
but posting a picture may also help to confirm if it is a ich.