My aquarium is a 40 gallon breeder, 36L 18W and 16H. I was thinking of just using powerheads to do it because I don't think my aquarium is high enough to support the pools and such, but if it's possible, I'll be open to it.
I also saw a guy drawing up plans on how he was going to make his rapids tank, and he had two powerheads on one side running just above the substrate. Is this a good way to go about it also?