i brought 6 o's 1 pair of copper oscar, albino tiger, black tiger.now the copper end black oscars came 2days before the albinos. Now i some times see the black tigers picking on the albinos. A years back ibrought full grown albinos pair and introduced them to my black tiger pair, and they keep on fighting. My lfs said black and albinos dont mix. Is that true. My current o's are 3 inches. Usually i see them picking on the albinos,when the black tigers sre hungry. Otherwize no serious picking. I point is this since i an introducing thm at a small size, they will get along well. Plz comment. Tank size is 6*2*2 ft..