I have enjoyed my Pool Pilot SWG for almost a year now. It's been working great. The one feature I wish it had (but I don't think the technology exists) is a free chlorine sensor to controls the cell output level. The pool goes from periods of fairly heavy use to stretches of little use, and during the lulls the chlorine tends to build up to as much as 5-6ppm. Normally I only need 1-2ppm. It would be nice if the level could adjust itself.

Anyway, there is one thing that puzzles me. In almost a year of use, I haven't had to add any acid yet. The pH was at about 7.6 when I started using the SWG and it's stayed there the whole time. I even tried a different testing kit to make sure there wasn't a problem with mine.

The pool is about 10,000 gallons and I run the pump about 4 hours/day, a little more in the summer. The cell output level is set at about 20-30%. I stabilized the pH with a fair amount of borax (a couple of boxes I think, but I don't remember). It's an indoor pool so it gets no leaves or other junk and as I mentioned the chlorine level doesn't need to be very high. Still, I haven't noticed *any* pH increase. (It's not going down either).

Did anybody have this happen to them? I am puzzled and even a little worried.

Thanks!
Luigi