PetSafe Drinkwell Avalon & Pagoda Fountain Activated Carbon Filters - Better Hydration Choice - Long-Lasting Purity - Odor-Free Drinking - Universal Filter Replacement - 4 Pack

These filters do their job and last a while before needing replacement. Only thing to watch out for is making sure you run them under water for a while before using them.The filters will work for the 1/2, 1, and 2 gallon water fountains made by PetSafe. Company also says it's compatible with their other fountains. When buying a pack of 12, they come in a small cardboard box but are individually plastic wrapped.The filters work as intended. A lot of grime that builds up over time from my two cats drinking water out of the fountain will collect on the filter. However, don't overestimate these either. They only work as well as the fountain can use them. I have the 1 gallon water fountain. I will still find small particulates at the bottom of the water. But I believe that is just the fountain not being able to cycle water with enough strength.Do they last 4 weeks like PetSafe claims? Maybe. If you remember to change out the water and clean the fountain each week, you might make a filter last 4 weeks. However, I do not do a full clean of the fountain each week. I usually do that at the 2-3 week mark. My filters average around 3 weeks this way, which is good enough for me.These are charcoal filters so it's normal to see black particulates when you first open them from the packaging. Rinsing is extremely important to prevent them from ending up in the water fountain. I run the filter under water for around 1 minute on both sides to make sure the loose charcoal gets washed out. If you do that, you shouldn't end up with any charcoal buildup in the fountain.Does the initial type of water used affect results? I believe it does. I've tested with regular tap from the faucet, filtered water from the fridge, and bottled water. When using regular tap water, I notice a lot more buildup on the insides of the fountain versus filtered/bottled water. I also feel that the filters last longer if you use cleaner water initially.Overall, for the price, these filters do their job. The minor complaints I have apply more to the fountain design than the actual filters themselves.

These pet water filter cartridges have been fantastic! They're inexpensive, easy to install, and do an excellent job keeping the water crystal clear and fresh. My pets have noticeably enjoyed drinking more often since we switched to these. I appreciate that they effectively filter out impurities without breaking the bank. If you want reliable filters that get the job done without the extra cost, look no further. Highly recommended!

We use these all the time and they work great. One time I tried a knockoff brand, and it would not flow water. I recommend you only use the real ones.

The design was perfect. It replaced the original filter perfectly. Water quality was good and easy to clean.

I have a couple of Drinkwell fountains for my spoiled cats who will only drink running water, so I need to keep those clean and running smoothly. These OEM filters are perfect for the job. My only issue is the advertised claim that each filter will provide 2-4 weeks of filtration - in my experience, that is not the case. At best, I'm able to get about a week of use from these before they start bleeding charcoal into the fountain. I'm talking a LOT of black sediment at the bottom of the fountain, and a ring of black gunk around the waterline. It's not pretty, and requires a thorough scrubbing of the water fountains on a weekly basis.

These perfectly fit the PetSafe Drinkwell 2 gallon dog fountain. Much cheaper than the tiny packs the pet stores sell. If you are washing the fountain every week or two, these are a huge savings! For just a couple dollars more than a 4 pack, you get a 12 pack!

These are way better than other off-brand filters for this fountain

Better price than at the pet store! Gets the job done!