Marineland PR2121 Impeller Assembly Emperor 400b Filter Parts for Aquarium

Works just great!

while the part came in and did work, it had little effect on improving the performance of my emperor400s. It was still loud with insufficient water flow.

Better than the original. Great purchase for my tank

Quieted down my Marineland Emperor 400s significantly! Replace that old, worn out, and noisy impeller.

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 fit, but might be a bit noisier than the original impeller.

Fixed my problem.

these fit my emperor 400,s. after using teflon tape on the old ones it was a pleasure to recieve these

Just as expected

My Emperor 400 was loud when I changed out the old propeller for the new propeller it got nice and quiet thank you