OK, here's a real simple (and dumb) question. I got my first MaxiJet PH and am putting it together. The instructions are based around using it to drive an undergravel filter. I'm not doing that. So, my question:
The unit has tubing to attach an air intake/venturi unit to the outflow. Am I correct that this is not needed to use the MJ as a powerhead only?
Thanks, Nick.