I set up a recirculating CO2 scrubber a few months ago which has not been impacting pH and I am not getting any color change with the media so something is awry (you can see how white it is in the photo). Life has been pretty busy so I've just left it in place but now I'm ready to do something about it. Anyone have any ideas on what's going on? Do I need to try to reinforce every fitting with plumbers tape or something else? Is it the way the media is in the cartridge? FYI it's an old RO cartridge that I bought all of the fittings to make into the BRS branded CO2 scrubber. Air is being drawn from the skimmer lid to the CO2 scrubber (there is a Y fitting with an "emergency" tube that goes below the water line in the sump in case the skimmer overflows).