What size tank do you need for an angelfish in cubic centimetre?

You would need quite a large tank, as angelfish can grow HUGE. Fully developed angelfish can grow quite big, so if you want three angelfish, I would firstly recommend an extremely tall tank. They like tall tanks because of their tall figures. The tank would need to be at least fifty gallons, but that's the minimum. It's preferable if you have a bigger tank, to prevent stunted growth, early deaths, etc. My recommendation is a tall tank that is preferably more than fifty gallons.