I have a 55 gallon tank and have always loved angel fish. I want them to be the 'center piece' fish in this tank. I was thinking about purchasing 3, would that be a good number? Which fish would best compliment angels? The tank is a standard 55 with plenty of filtration and has play sand as substrate. How can I best make this tank angel friendly? Is their an ideal temp/ph level? I'd appreciate any tips or advice. Thanks!