Marineland PRIM350B 350b Impeller Assembly Penguin Filter Parts for Aquarium

It installs quick and is quality, not some cheap part. And the price is affordable for basically the main part or near main part of the filter.

I have 2 Penguin 350 filters on my 75 gallon aquarium - the newer one is 2-1/2 years old. Over time the older one became noisier, but it happened so gradually that it was barely noticeable. It rattled a bit, but was tolerable. Then a couple nights ago it sounded like it was about to self destruct. After reading the reviews I decided to give it a try. OMG 😳. I installed it and turned the filter back on. INSTANT AND TOTAL SILENT OPERATION. I’m going to order another one for future use in the other filter. DO NOT buy a new filter. Buy a new impeller.

This replacement item made my filter quiet once again and is worth the cost to me , try it for yourself

Works great, but is very expensive that is why it doesn't get a 5 star.

If you are hearing a lot of rattling or rumbling noise from the filter, or it is just loud and the loud is not a water sound, its probably a worn out rod. What happens is the impeller spins millions of revolutions over time and wears out the stainless steel rod. You would notice that there is some play in between the hole of the impeller and the shaft. There should be no play. If you have a magnifying glass of a jewelers loop you would be able to see the rod getting thinner the closer it is to the impeller. You can replace that rod for a lot less than buying a new one. Here's what you need to do.1. Get some needle nose plyers and pinch the rod just below the end cap, if the end cap is at 12:00, have the end of the plyers at 4:00, and then pivot the plyers up to 2:00 and this should push the cap off.2. Remove the shaft, at this point there would be the other end cap on the other end of the shaft.3. At this point you can do 1 of 2 things, get some Vaseline like others have said and cover the shaft in it and put it back together (this will get you by for maybe a few days) OR3b. Go out and buy 2.5MM stainless steel rods on amazon, they come in 10 packs 300 mm long so you could make 30 of them if you needed to.4. Use your old shaft to determine the right length and cut exactly to that length using cutters and a grinder or dermal tool to smooth it off. Just make sure the length is right.5. Use Vaseline on the rod and put it back together with the end caps on the ends. You will have plenty of material left over for additional shafts.I did buy this one new because I needed it in a pinch, but I saved the old one and bought new the new stainless steel rods so I have one ready when this new one goes bad. I will just keep replacing the shafts and never buy a new one again.

Fit perfect. Works very well and quiet

Correct size for an emperor 450It wasn’t pulling water at first but now it’s going strong

My filter had completely failed and I considered a new filter system to replace it. I opted instead to replace the impeller in hope that it was all that was needed and it worked like a charm. I didnt even realize how much suction the unit had lost over years of use but this worked great and is moving water like new again. I couldn't be happier and highly recommend.