Product review (5 stars): Water treatment solution
Ordered these online because local stores no longer carry the water treatment for the Venta humidifier system.  The Venta works great and is quiet, however it needs the water treatment to spread the water across the disks so it can evaporate.  This treatment used to come in a bottle but now is available in individual packets.  This product doesn't seem to cause brown sticky substance to build up on the water wheels.  Not inexpensive but comparable to other humidifiers where you have to replace the filters.  No filters on the Venta Humidifiers.