Nothing like bumping a thread, with your first post, after a few months to start talking kitty litter for humidity over proven products that many people use.
Can anyone find Shilala's tests with Heartfelt vs. HCM vs. Kitty Litter?
If I recall, his tests, which are far more in depth than anyone else has probably ever done, he found that not only do they not regulate humidity well, fluctuations are very common and they have no pre-set humidity. Also I believe that the volume needed to be remotely effective was well over 3 times as much.
