Marineland PR2121 Impeller Assembly Emperor 400b Filter Parts for Aquarium

Super easy to replace and works like its brand new. I have a video on YouTube on how to replace it

Exactly what I needed. Item as described.

This impeller stopped all the noise we had from the fish tank filter.

We bought a whole used aquarium set-up through Craigs List - and the Emperor filter was noisy and weak. So we thought about replacing the filter, but many reviews said that replacing the impeller might just do the trick. The good news: like those reviewers said, it took a noisy, weak filter and made it quiet and powerful. Saved us quite a bit of money, at least until ... The bad news: Four months later, and its back to noisy and weak. So its another twelve dollars, and hoping that it lasts longer this time.

It works well, is quiet, and has prolonged the use of our physical/bilogical filter.

Works instantly

new impeller, quieted the motor and improved flow.

Made my Trusty Emperor 400 as powerful as day one.

Makes one the bio-wheel filters that I have used, perform at its peek efficiency.

This was a super easy fix for my noisy pump. Read a review that laid out my same problems 2 days later fixed. Super happy with this purchase.