Highly recommended!
I found it hard to believe that a little bag of tiny water-retaining spheres could effectively replace a big block of water retaining foam, but they did. I swapped out the nasty old foam block in my big Oasis XL II humidifier and lo - even more balanced humidity, and, less distilled water consumption. Trying is believing and I am now a true-believer in these nifty little water beads. Just a bit of bacteriostat and months of clean, moist air keeps my trove of hundreds of sticks in primo shape.  Highly recommended!
Rating: 5 stars