Ok, so I'm a brand new owner of a 26 gallon fish tank with the intent of buying fish, imagine that! anyways, I fell in love with the red tail shark so I waited my 2 days for the tank to settle in then I ran back to the store to buy just 2 fish to see if everything will work. I got myself 2 red tailed sharks cause they were cool, and because the guy said it was ok. well, needless to say they started fighting when they got in the tank. After reading a lot online I now find that you can't put more then 1 in a tank, some sites said you could if it was really big and/or had a lot of areas to hide. anyays though, how is it that at the store and in the bag on the way home they don't fight? If you can't put more then 1 in a tank how is it that the fish store has like 15 in tank? should I bring one of them back? thanks!