Product review (2 stars): Misleading claims...does not eliminate odor or prevent bacterial algae
The product claims to eliminate odor and prevent algae formation. We have been using this consistently over the past 6 weeks and there has not been a single day where I have not had to clean the water reservoir of the algae. We have two SPT SU-4010 Ultrasonic Dual-Mist Warm/Cool Humidifiers and for experiment sake I stopped using this water treatment in one of them and instead started using ProTec Continuous Cleaning Cartridge/Antimicrobial Treated Filters. The humidifier with the ProTec cartridge did not have to be cleaned of any algae for over 3 weeks. I only made sure to empty out all the water each time before filling it back up.

I do not recommend this product.