Ok, so I'm having trouble finding powerhead information..so I thought why not start a dedicated thread? What is a powerhead? An aquarium powerhead is a water pump completely submerged into an aquarium to circulate water; usually this is used to create flow throughout the tank. For example a single powerhead could be used at one end of a freshwater aquarium to simulate a laminar river current, or multiple powerheads can be positioned throughout the aquarium to create more turbulent flow. For our purposes it is used to increase the amount of dissolved oxygen into the water. What type powerhead are you using? Is it better than airstones?