These always work well for us.
My husband and I got a water filter pitcher when we got married. We got these filter replacements as part of the wedding gift. They have been great for us. You soak it in water for about 15 minutes before putting it in your pitcher. Then, you place it in the middle of the pitcher and run water through it. It can be a little time consuming when you have to switch them out. However, it does not take a terribly long time and it is worth it for the water quality. Also, when you change a filter out, they can be hard to get out of the pitcher due to being wet. I usually wrap a towel around the filter before pulling it out. Overall, it is a really good product. Each filter replacement lasts for about 2 to 3 months. They produce some black residue but it usually stays trapped in the top of the pitcher. They are pretty expensive but a pack of them will last you a while. Therefore, you only have to spend the money a few times a year. I would recommend these to anyone looking for clean water.
Emily0609
USA