Ergo Pet Oasis Replacement Water Filters, 2 Pack

The quality seems to vary from filter to filter. Some are so restrictive that the pump is unable to circulate water through them. Others work fine, and you can't tell by looking at them. I notice the difference by blowing air through with my mouth. The air goes through easily on some and with difficulty with others. I am going to start saving the bad ones and sending them back.

I have had a pet waterer since 2009. I never had any problems with it.In March 2011, I had to purchase additional replacement filters. I bought these. I have used at least 4 different filters and they solidify within a week not letting any water through. Compared with the filter I had been using (they never locked up), this is terrible!I was used to the older filters so I didn't pay any attention. At least the last four times I have used the filter, within a week the water is stagnant, dirty and starts developing a glossy film.If you are interested in buying these, contact the seller to make sure this problem has been fixed - or at least keep an eye on your waterer. Thankfully my pets didn't get sick!

only place to get replacement filters. They do not last too long, about thirty days.

Even though I use ONLY filtered or purified water in the fountain, these filters clog SHUT in less than a week now. They USED to be good for a month, this is now too expensive for my budget.Very disappointed

These filters are complete junk. They are a multi-layered filter, with each layer of filtration "supposedly" providing a beneficial purpose. However, this filter frequently becomes clogged. The first layer of filtration is a particulate screen; good in concept - bad in implementation. The useable surface area of this screen is less than an inch in diameter, so any debris (usually food particles and hair) that falls into the reservoir bowl will clog this filter fairly quickly. It usually takes about a week to clog it up. Once it becomes clogged, the water no longer flows. Well, so much for filtered water.An easy way to unclog the filter is to back-flush it. Weekly back-flushing will extend the filter life for about a month before it has to be replaced.The filters originally came four to a pack, then three to a pack, now only two to a pack, but the price has never decreased. Ok, blame it on inflation. (Greed?)

I use these filters on the large water fountain for my cat Wyatt. Without the filter, the water will become dirtier faster (mostly because of pieces of food he puts in there from the large automatic feeder).FYI, these filters are shipped 2-per pack, something that isn't mentioned in the product description.

This is exactly what we wanted - these are replacement filters and they are exactly what we expected