How to position a check valve and an air control valve?
I have a Tetratec 12 air pump. I previously ran it through a 3-way gang valve. Now I've seen small air control valves that aren't as big as a gang valve that I'd like to try. So how do I position the air control valve with a check valve? In the air tubing coming from the pump, would it be -- air control valve, check valve, sponge filter, OR -- check valve, air control valve, sponge filter? Thanks!