I took a Cheap Two Outlet Air Pump, removed the Screwed on Rubber Base. Drilled two Holes in the side so the entering air would pass over the Coils. SuperGlued Lee’s 1/4” Rigid Tubing in the holes. Reinstalled the Base, sealing it and the air intake with Aquarium Silicone Caulk. Ran a 3/8” Clear hose to outside, attached a small jar, to the hose for Dacron and Charcoal Media. Made a Manifold for the other end, from PVC Pipe, and using Lee’s 1/4” Rigid Tube. Hooked the New inlets, on the pump to the Manifold. I push the outside air into the LifeReef Cup, as that’s where the Air intake is. I run Constantly between 8.1 to 8.4 pH. The pH changes slowly when it does change. BTW, I have a Pinpoint pH Monitor.