My son likes Tiger Barbs and has a 45 gallon tank. He like the pitus catfish and Blood Parrots. Do Gouramis get along with Tiger Barbs? Do Silver Dollors get along with TigerBarbs? Looking for a nice larger type fish besides Barbs. Would like a top, middle and bottom fish in the tank. Amy mix besides other Barbs would be nice. We already have Golds and Cherrys in my daughters tank. I would like to try something different. Thanks for any help.