A disposable filter that catches bacteria, metals, and other particles in the water before they are evaporated into the air. Made from wood pulp, this antimicrobial replacement filter is 2x more efficient at wicking and evaporating water than synthetic filters. Used together with the Canopy humidifier, this high-tech system delivers clean, no-mist moisture that's good for glowing skin and healthy lungs. If you use your humidifier 1-2 times per week in tandem with distilled or filtered water, you will need to replace your filter once every three months. If you use your humidifier daily, you will need to replace your filter once every six weeks. If you use tap water, especially if you live in an area with hard water, you will need to replace your filter once every month. - Slight discoloration will appear shortly after use begins, this means that the filter is working. - The filter is supposed to get completely wet. This does not mean the Canopy is leaking. - Canopy's filter light will illuminate when it's time for a replacement filter.