Product review (3 stars): 1 filter of three pack is damaged
I'm sure it was just damaged when it was shipped, but when I opened the item day before yesterday, one of the filter units was cracked, and what appears to be charcoal granuales were in the three pack plastic wrap.  Now I have to go through to process of returning one of the units and asking for a replacement.  The unit I installed appears to be operating fine.