Marineland PR2121 Impeller Assembly Emperor 400b Filter Parts for Aquarium

It works in a marine land 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 is easy to install and uninstall for cleaning

I would have bought these at the same time I bought my filters if I knew what kind of difference they would truly make. It is crazy how much quieter my filters are now that I replaced the impellers with these bad boys. Talk about a world of a difference! I highly recommend these for any body that has a loud filter. I have sand as my substrate inside of my aquarium and it is always getting caught up in the filters, the stock impellers could not handle it but these have no problems and are still completely silent after two months of owning them. Definitely worth the purchase, they will make a world of a difference in your house!

All is good

Very quiet replacement thanks.

My husband ordered this for his fish tank filter. It worked perfectly, and now the filter is doing its job without the loud noises.

Like others have written one of my Emperor filters was slowing down flow quite a bit. Part arrived and after installing the impeller it was like night and day. Very quiet and works great so I am getting ready to purchase a second one for the other filter. By the way, it got here in record time for paying regular shipping fee! Couldnt be happier with this product...

It didnt make a difference. My pump was noisy before and after installing the replacement impeller its just as bad. Super upset! Ordering a new pump immediaty and diffenstly not a Marineland.

Works perfectly in my emperor 400 filter!