I used to buy pet fountain filters on Amazon, but I've changed to a policy of not buying anything health-related since reading about Amazon's counterfeit issues

I used to buy pet fountain filters on Amazon, but I've changed to a policy of not buying anything health-related since reading about Amazon's counterfeit issues. I considered buying a pet fountain filter, but checked the reviews and found lots of horror stories about build up of slime and mold on counterfeit filters. One story even had a cat dying in way plausibly connected to the filter [1]. Unfiltered tap water won't kill you, but a counterfeit filter might. [1] https://www.amazon.com/gp/customer-reviews/R2T55842GRHFBG https://www.amazon.com/gp/customer-reviews/R2T55842GRHFBG