and I did notice that the release a lot of carbon dust into the water

Rinse thoroughly before installing to get the carbon dust out.

Make sure you rinse them as instructed, or the carbon dust will be in your fountain

lately the filters seem to be leaving alot of carbon dust in the water ,even after rinsing them extremely well before using them.

I rinsed the filter thoroughly before using it like always, and it wasn't the carbon dust that sometimes comes out of these

The PetSafe Drinkwell filters are well-made, drop right into the fountain, last pretty long (longer than it says on the package, if you routinely clean them), and they don't put carbon dust in kitty's water.

I will say make sure you rinse it to get all the carbon dust

I normally don't give one or five star reviews unless it's as bad or good as it can possibly be

They work as they should!

Doesn't keep the water as clean as it says

Since this is the only filter that will work with my fountain, I guess it works as it should.

Buy these every few months for my small pet fountain, and they work as they are supposed to

Short review: Piece of Useless S*!t!Third edit, December 3.

It will sink t the bottom of the bowl and chill there til you clean it out.

It will sink t the bottom of the bowl and chill there til you clean it out.