Review on 🔍 Optimized Search: Marineland PR3342 Impeller Unit for Explorer/System3/5hex Filter Parts in Aquariums by Jessica Hall

Ordered two. Marineland was sold out so I went to Revain. I think it's seconds or defective. The first one never started, noisy no matter how I put it in the filter block, it was noisy like something was wrong. The bottom rubber "cap" was always misaligned or warped, every time I cleaned it I had to readjust it, never had to do this with an impeller. I replaced it with the second one I ordered and one of the rubber caps was completely missing. Doesn't work without it so I used one of the caps from another impeller to get it working, finally works great. If you decide to buy them, check them carefully and if they don't work, act accordingly so you can return them.