Hi how many of you guys run power heads in your african tanks? I have a 6x2x2 tank i am setting up was wondering wether to run a power head or if it was necessary? I am putting in a 4 air cutain for aearation so it would purely be for current flow. Any thoughts would be appreciated (i,m from Aust i know you guys go by gallon size for your tanks we go by tank size have no idea how many gallons this will be)