saw a video on BRS TV,,, about routing the intake line for the CO2 scrubbing media scrubber to the top of the collection cup on the protein skimmer..
This way air passed into the scrubber media is already low in CO2, and has to do less work...
(your media will last much much longer, and your pH will be higher !!
just started it a few days ago. and my pH mark is 2 hours ahead of the previous day.
give it a try !
https://www.youtube.com/watch?v=wZbl...Hd17suKl4WgBBg
21:30