Product review (2 stars): last only a short time(2 months) and piles off to layers when I was installing it.
It lasts only a short time(~2 months). I can usually use one full tank of water in one night when the filter was new. Two months later, it cannot even use 3/4 of the tank even I turn the level to "high". And it peels off to layers when I was trying to install it.