[mr.maroonsalty]

Have you seen the vender version using the canister filter housing? If you're using about a gallon of media; for a small tank a 2l soda bottle might work perfectly. I now see the need to run it to the largest aerating piece of equipment, and why another means would be working against it. Do I assume correctly that you're still seeing the same diurnal ph swings? If you are seeing almost immediate results, I'm thinking that material life could be extended up to 50%, if air was scrubbed only during the night.