On Sunday I bought 2 4" tiger oscars. For the first few days they were sulking in the corner as I read they do. Over the last day and a half the one acts like a little water puppy. When he sees me he swims over to where I am. The other one just sits at the bottom of the tank and seems to be breathing real heavy. Also on two occasions I saw a string of white poop coming out of this fish. Is this stress, or did I buy a sick fish. I have not been having very good luck with the oscars I have been getting.