i have 3 aquariums. a 55g with a penguin bio-wheel 350, a 20g with a penguin bio-wheel 200, and a 10g with a penguin bio-wheel 150. i kno that the 20g and the 10g have plenty of filtration but im not sure about the 55g. how many times should a tank cycle through in an hour

as of now my 55g is cycling through 6.4 times per hour. is this enough

the tank does not surrently have any fish in it but it will eventually be stocked to maximum capacity.
thank you