ok so i have a 55 gallon tank with 3 small powerheads that arnt quite doing the job! i have alot of corals that need a good amout of flow and am wondering what gph or what type of powerheads i shoudl get! the corals i have is! alot of starburst polyps, Gonipora, Cup coral, large amount of devils finger coral, 2 ricordia, bubble tip anemone! thanks in advance!

