Hello everyone, have any of you connected the intake of your skimmer to a pipe leading outside of the under-tank chamber? I tried searching the forum, but I only found a few people who extended the pipe all the way outside the wall. Two days ago, I allowed fresh air from my home to enter, and I noticed a significant increase in ORP (oxidation-reduction potential). I understand that some might not pay much attention to this parameter, but it likely indicates that the oxygen level has risen to its highest point. As a result my PH also rises a little bit. My assumption is that due to the very close design of the intake and outtake for most skimmers, the air circulates within the chamber, resulting in fewer fresh air exchanges. I'm a bit surprised that no one seems to be discussing or experimenting with this. In fact, it might yield similar results to outdoor piping. What are your thoughts?