I just received my BRS CO2 scrubber, and I thought I'd make things more efficient by running a line from the scrubber, to outside. I have hear people express concern over pollutants getting into the tank this way, so I figured I'd run a DIY carbon filter between the scrubber and the outside line to absorb any nasty chemicals that may be in the air. Where I am stuck is deciding exactly how I want the filter to function, and what brand/type of carbon i should use in this application. My current train of thought has be suspending the carbon in RODI water, and having the air, pass through the carbon/water mix before going to the CO2 scrubber, and then the skimmer air intake. I've also been considering just leaving the filter dry, and hoping for the best. I could use some discussion here on the pros and cons of each application, as well as a brand of carbon that would work for this.