Marineland Rite-Size Cartridge

Great product keeps my 30 gallon tank clean and clear. Purchased through Amazon at about 1/2 the price in the local pet store.

These cartridges are a breeze to use...Open the back top of the filter, pull out the old cartridge and slide the new one in...Gone are the days of removing the entire filter assembly, messing around with wool and charcoal...1,2,3 done...If there is a downside to these at all, it is that they can clog relatively fast (8-10 days)..That said, I think these are a top notch answer to an unpleasant task

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It took no time to get here. Very fast! The write up stated it was a 3 pack of filters but when it got here it was a 6 pac. Not complaining!! Thank you very much!!

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This is the cheapest I have found on these filters, both on-line and in store. They arrived in perfect, new condition, as expected. I love the Penguin brand filters for our 2 20 gallon long tanks. They really do the job of cleaning up after our axolotls!

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These filters are very efficient and fairly easy to install. You can rinse and reuse once or twice if needed.

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