How many of these fish should I start off with to end up with a pair? I'm thinking of ordering 6 small altum angelfish in the upcoming week for a 55 gallon grow out with some Cory cats and a few potted plants. I just finished cycling the tank and only plan on using it until the fish gain some size and I can move them to a larger tank my only question is out of the 6 fish should I end up with a pair/also what size tank is recommended for a breeding pair of these angles being a larger growing species would the 55 I plan to grow them out in work?