Piece Availability: Usually ships in 1 to 2 months

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Buyer's feedback: - * Does what is says ...
Last about six weeks keeping water tank clean. Does not help at all in prolonging the life of the filter.

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Buyer's feedback: - CLEANS TANKS, WELL IF IT DOES I SURE WOULD LIKE TO KNOW WHEN ????
ProTec PC-1 Humidifier Tank Cleaning Cartridge (Pack of 2) I SURE LIKE TO KNOW WHEN IT GOING TO KEEP MY HUMIDIFIER CLEAN ???? STARTED PROTECT WITH A NEW MACHINE, AND EVER THREE TO FOURS DAY I HAVE TO CLEAN MY MACHINE BECAUSE OF THE GREEN WATER AND DEPOSITE

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Buyer's feedback: - * Make too much noise to sleep ...
The cartridges were part of a package deal that I purchased from Allergy-Be-Gone. Its' hard to determine if they actually do anything, and they rattle around inside the water tank when water is moving from the tank to the heating element. So with every 'glug' the water generates, there is also rattling from the balls. I prefer skipping the balls, and cleaning the humidifier. Some humidifier tanks have a holder for these balls, which would eliminate the rattling.

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Buyer's feedback: - Hard to tell...
So far, I haven't had any problems with this product, but it might be too soon to tell...

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Buyer's feedback: - * Work great! ...
These work great. I find I don't have to change the filter or clean the humidifier as often as I do without using one of these. I feel they are worth it.