NPET Upgraded Design 4 Pack Replacement Filters for WF050/WF100 Cat Fountain and WF210 Stainless Steel Pet Water Dispenser

I used up the filter and sponge that came with the fountain, and I saw these. They look the same, they fit perfectly, and they have been working very well in my machine. It's easy to pour the water in but I can tell it's filtering well too. It was very easy to place the sponge in the filter motor piece and the main filter in it's spot. Just fit right in there, no fussing. I did run water through it first to "prime" the filter, and I haven't found any debris or carbon pieces in the water or lower basin. The fountain pumps quietly and well, just like it was new. A great way to have these for 4 months supply! I'll stick with this brand for them!

Works well, first fountain perfectly. Needs replacing more frequently than expected which doesn’t make it cost effective

They are exactly what I needed... perfect...will buy again

This is a review for their 8-pack of filters, which appear to not be sold anymore. Because of that, I ordered two 4-packs since they’re currently cheaper than the 6-pack. $3.25 per filter for the 4-pack and $5.00 per filter for the 6-pack. That doesn’t make much sense. Despite that, the filters work very well. The fountain needs to be cleaned at least twice a week, otherwise the water gets gross and slimy. That makes the fountain and its components harder to clean. If you think about it, as humans we don’t like reusing the same dirty water bottle day after day. So, for our fur babies let’s give them what we give ourselves and clean their water fountain often throughout the week. This will help the filters last longer as well because they won’t get a build up of sludge and fur on them. If you’re expecting to have clean water after a week or so, the water will be gross by then. As long as you do regular upkeep with the filters and the fountain, it will run smoothly and clean as it should. My boy loves this fountain and has since he was a kitten (now 3 1/2 years old). Now my girl (4 1/2 years old) loves it too, even though she is more picky with her water sources. 5/5 stars and will continue to buy more. Very happy!

Good for a price.

It’s pretty easy to set up, use and clean. We recently bought a second one. Our first lasted 4+ years being constantly on and somewhat abused (ran low/dry several times, unintentionally). We were sad when the first finally gave out but immediately bought another.

I love these filters. I reuse them by soaking them in white vinegar after a week of use and rinsing them out well. They last longer that way and stay healthy for the cat.

Worth it. Ives used other filters and these are the best I’ve tried.

Work very well

Works well, but begins to turn brown after 15 days.

The fountain is still working great and these filters are reasonably priced.

I bought it instead of regular filters. This one doesn't stink. Does not have chemical odors. Cleaning charcoal inside. I think this filter is much safer for my cat. Although it is written that you can use it for up to 4 weeks, I will use it for 1.5 weeks. I change the water every 3-4 days. Each filter is hermetically sealed.