<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div>I received my four new scrubber cartridges, I installed one in my scrubber and it does not work as well as absorbent. When I breath through the cartridge, it seems to take more pressure to push air through. More experimenting is required. I have modified my scrubber so it has one fan pushing air in and one fan sucking air out the other end. Maybe that will be the ticket.</div><div>Hank</div><div><br></div><div>Where do you guys set the pediatric O2 regulator, seems to work well at 1/4 </div><div>Hank</div></div></body></html>