Marineland 24-Pack Penguin Rite Cartridge, Size C

My filters came right on time... An added bonus was you got two free filters in each box, love it!

Great buy. Ian a steady buyer

Use for the easy way to change filter cartridges. Have the filter set in a 50 gal tank where I winter my pond koi. Kept all of them healthy a clean over the winter, not an easy task with koi.

I use two of these at a time so buying them in bulk works just fine for me. They keep the water clearer that way.

This multi-pack of cartridges was an amazing value in comparison with our local pet supply store for the same product we have trusted for over a year now. They are easy to install into the filter and it is easy to tell when they need to be changed as well.

great seller great price thank you

All works fine. No problems and have been ordering them for over five years.

I ordered these late, two nights ago and they arrived today. Very pleased with how quickly I got them with the free shipping. I was very happy to pay the price on Amazon, compared to PetsMart they charge nearly $6 a filter. The only thing I dont like is, I bought the ($55) filter unit just three weeks ago for my 55 gallon fish tank and I have to put two filters in at once and they swell up when dirty. Tip: Make sure to face to the back to it doesnt jam the wheels. Looks like I will have to replace these filters every two weeks- 4 a month- very costly....so I wish they would last longer.

right product, good price.

Great bulk value!