keep em very well fed and keep temp at 76-78 to keep agression down untill their like 6", by then it will be time for a larger tank. plants/branchy driftwood is nice to break up space and provide cover for each P. when i had p's they liked to play in bubbles so maybe add a bubble stone. once they get 3" or so throw in a powerhead for current, it gives them excercise and also helps keep aggresion down. and have fun, i raised 7 rbp's from dime size, ite very rewarding to know you grew em from tiny babies.