Review on Tetra ReptoFilter Cartridges Whisper Technology by Skye Gunnell

These are excellent quality filters. They purify the water and make it transparent. I'm cheap when it comes to these things. I rinsed the filter thoroughly every week and each filter ended up lasting months and months. In fact, one of these pacts lasted a full year, and the waters never clouded. When you clean them, be careful with them. If you're too rough, the black bricks inside can break out and you'll have to throw them away.