I currently have 2 tanks that I want to redistribute the stocking. I have a 180 gallon and a 90 gallon. My fish to be devided are: 4 tiger severum, 1 gold severum, 5 electric blue acara, 10 rainbow cichlids, 2 yellow head geophagus, 1 bala shark (rescued from friends toilet), 3 silver dollars, 1 tiger oscar (rescued from same toilet), and a bunch of albino corydora. The 180 is black sand substrate and 90 is river rock. I know I want the oscar in the 90 other than that bring on the ideas.