Product review (5 stars): A must for humidifiers.
This is the first time adding this to the tank of water for my humidifier and I will never go without it again. I used to have to change the filter every 3 months because it would start to have a funny smell and it would turn pink and black with bacteria. Now I add two tablespoons of this liquid to the tank of water every time I fill it, and I still have a clean fresh filter even after one month. It has no smell. It just keeps the tank and filter clean.