Air Filter, ProTec Cleaning Cartridge, 2/Pack HWLPC2 Review

I have an evaporizing humidifier. I dropped one of these in the tank and my filter was good for almost a month. The indicator barely moved. I removed the cartridge from the tank and intended on getting a new one from the store. I put it off and forgot and my filter was bad by the end of the week. My new filter only lasted 2 weeks without the cartridge. This cartridge extended my filter life by almost double. Probably would have been longer if I had replaced the cartridge sooner. $30.00 later & replacing my filter AGAIN I'm buying more of these. They definitely help.
*and changing the cartridge once a month is extremely convienient compared to liquid chemical solutions you have to add each time u fill the tank*

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Product Description:
Antimicrobial treated filter for 3 and 4 Gallon Output Per Day Humidifiers (HWLHCM630 and HWLHCM645), both sold separately. Two filters per pack.

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