Product review (1 stars): There good for a couple weeks
If you clean you unit often this filter will fall apart from handling it once it's been wet and it gets a lot of build up at the top from the minerals in the water. Some filters have metal reinforcement and that may help prolong the filter but this doesn't. Just play on buying one or two a month. I add a tsp of bleach to my holding tank every other fill and that seems to keep the bottom part clean and don't have to take it apart to clean every couple days.