Product review (3 stars): We bought this 3 pack a few months ago and ...
We bought this 3 pack a few months ago and one of the three was defective. We installed it and ran 3 gallons of water through it and there were wierd little floaty things in it.  We switched out the filters and it did not happen again. No floaties! All clear! Unfortunately it is no longer in our purchase history with Amazon so I can't return it.