Marineland PR2121 Impeller Assembly Emperor 400b Filter Parts for Aquarium

Works perfectly in my emperor 400 filter!

Had to replace due to my part breaking. Works perfect.

Filter did not work with old impeller. Filter works with new impeller . No complaints

Replaced broken (and very noisy) impeller on Emperor 400 filter. Compared to what we had, the noise level was reduced significantly. No complains so far.

My 400 was never quiet from the start. After like 6 years, it was getting really loud so tried this. Now I just hear water from 3 feet away.

It is exactly what it says. I bought a used Emperor 400 filter and the old impeller was bent which made the filter extremely loud. This one fit perfectly and has made the tank far more enjoyable for my ears and also for my fish who are now getting proper filtration.

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

Nice and quiet

it was time to replace

needed a replacement and this worked just fine