"I bought this after I got fed up with my diatom filter (supposedly the best filters you can buy) and just boxed it up and threw it in a corner. It was leaky, noisy, and the powder kept cycling through. I bought this as a new filter, hoping it would be better than the mediocre tetra filter that originally came with my aquarium set. And man, am I pleased with it! The only sound I hear from it is the sound of the water coming out of the filter, which is actually a nice, calming sound. The water quality is on par with the diatom's (when it worked) and the maintenance is much easier than the diatom. And, my fish seem much happier without the strong current!"