Marineland Penguin Bio-Wheel Replacement Power Filter Cartridges, For Aquarium Filtration, Rite-Size C, 6 Count

I find these to be the best filters for my 75 gallon freshwater tank. They are quiet and my water quality is on point. Easy to use and inexpensive.

Works great and easy to replace

Been swapping between these and a few other options for years. They get the job done just fine and keep the water clear. They fit as intended and swap out replacements like any other. They last a good month with the right set up. You would not want to wait too long or their contents may impact your water parameters.

The Marineland Rite-Size Cartridge C is a must-have for anyone with an aquarium that uses a filter system compatible with this cartridge size. I’ve had a hard time finding these in stores, and when I do, they are often priced way higher than I’d like to pay. That's why I love getting them on Amazon – they’re so much more affordable and I don’t have to deal with store shortages.These cartridges are easy to install, and they do a great job of keeping my tank clean and clear. They’re designed to remove impurities, odors, and debris from the water, which keeps my fish healthy and my tank looking great. The quality is consistent, and I can rely on them to do their job without fail.For the price and the convenience of getting them delivered, I highly recommend these cartridges for anyone with a Marineland filter. It’s a great deal compared to buying them in person at the store, and you’ll save both time and money!

Exactly as they describe very good price . Cheaper then PetCo and PetSmart .Works well

Marineland products have shown themselves to be high quality for me. The filter I bought for my 40 gallon has run strong since I bought it 2 years ago. These filters have a very long life depending on your filtration needs. They rinse off well and the filter media lasts very long. I can make this box last for quite a while and they function very well keeping my fully stocked tank very clean. Obviously the perfect size for the filters it’s made for and is a good design. This size box is a MUCH better value than going to the pet store and buying the 1/2 packs.

Bought these many times for the filters on my 29 gallon aquarium. They fit the other brands of filters and do the same job! Depending on how messy my fish were (or how much I may have overfed), I would rinse these filters with each water change (usually every 2 weeks) and then replace with a new one monthly. If you have more than one filter, I would replace on an alternating schedule because there is beneficial bacteria in the filter.

Right filter and fit right.