hi im dave, i own a 4ft by 1 1/4ft cold water aquarium where i keep 2 calico orandas, 3 red and white orandas, 3 orange fantails, and a plec. i also have a 4ft by 4ft by 2 1/2ft pond containing shubunkins, golden rudd, tench, golden orffe, gold fish, and koi.