I saw a raise initially, but the issue with the recirculating scrubber is I think it gets too much moisture in the chamber. Do you think that affects how much PH raise you get? Every other day I take it out of recirculating mode to dry up the chamber a little as I am told you don't want the media to have too much moisture. My tank went well into the 8.3 range the first week. I am only now on week 3 seeing any color change on the media. I'm running the same generic BRS Co2 Scrubber. Also I have an all in one Innovative marine 60 gallon and a Tunze skimmer. With all of these skimmers I think the bigger the skimmer is the more air it can pull in and pass through the media. With a smaller skimmer I don't think you get nearly as much air through the reactor.