You remove the silencer from your skimmer's pump tubing and connect that tubing to the scrubber "out". Air is pulled in from the CO2 scrubber's "in", goes through the media to scrub it, then the air is pulled into your skimmer.
It doesn't necessarily increase it but it'll stabilize it.
Example, if you do a water-change and your pH is 8.0 and slow decreases after a few days, the CO2 scrubber will get it back to ~8.0 and keep it there, not raise it past that.
For me, it solved any and all pH trouble(s) that I had.
Lightly used Bulk Reef Supply Universal CO2 Scrubber for sale. Not pictured but I will include six feet of brand new 3/8" tubing. This retails for $34.99.
Also included are two 9-pound jugs of Bulk Reef Supply CO2 Color-Changing Absorbent Media, which are brand new. These retail for $40.00...
About 70-pounds used in my tank. Cleaned and bleached. I'd recommend re-doing that and curing it of course. About 20-30 pounds of it was never used, so it's new.
Grand total 105-pounds, paid $397.95 retail.
Ready for pick up in Medford, New York. I live right off the Expressway. Asking...
Purchased but never used. Cured for a few months in a heated saltwater reservoir.
1. 40-Pounds Mixed Size Real Reef Rock, $249.99 Paid
2. 15-Pounds Large 7-14" Real Reef Rock, $97.50 Paid
3. 50-Piece Real Reef Frag Rocks, $45.99 Paid
Total retail paid $393.48.
Local pick up only in Medford...
I'd like to get rid of this tank but doesn't seem to be much interest in it.
I'm willing to let it go for $1,100.00 as any interest I have had the potential buyers need to consider the move to their location.
So $1,100, MINT condition Red Sea Reefer 450, white, no scratches on the glass or...