Marineland Micron Cartridge, Fits Magnum Canister Filters

I use this Marineland Magnum polishing filter every time I clean the the tank and change water. The results are spectacular within the hour producing crystal clear water. The filter typically lasts for more than a year with a quick rinse between uses. Great quality and value for an integral piece of my aquarium maintenance.

Great product. Fast delivery. Will order again.

Great. Didn't need it but whatever. Now I have it.

This filter insert does a fantastic job of removing suspended debris from my tank. I change it twice a week, using two filters in rotation. My first pair lasted one year. My best advice is to follow cleaning instructions, and do not use any mechanical means of cleaning. Don't use your fingers, a brush or anything. Just spray with water removing as much junk as possible, then soak in a 25% solution of chlorine bleach for about 24 hours. Then rinse thoroughly and air-dry. They look like new with this treatment. UPDATE: I have also learned that these filters age over time in spite of appearing to clean up quite well with chlorox. I find that my old filters work well for a week or more while the new ones show reduced flow and some filter noise after 2-3 days. Same tank and filter housing. I find that the new ones are filtering better, by not letting as much material through, thus they are loading up faster. This is actually what you want. The water is even cleareer as a result. Well, I thought if 24 hours soaking in bleach solution is good, how about 5 or 6 days. DON'T DO IT. The rubber on the filter starts to dissolve and become very sticky. Had to discard. Stick with the instructions! Don't do what I did. Still a fantastic product!! Good luck.

This is an excellent filter. It really cleans and polishes the water💧. I have three FLUVAL FX6's on a 200g tank and they do a great job, but! The water wasn't crystal clear. This filter in a Marineland Magnum really polished the water, absolutely love it. It's now crystal clear using this filter. Follow the cleaning instructions correctly. It calls for bleach and water, soak 24 hrs, remove and rinse well. This works beautifully. But don't leave the filter in the water and bleach any longer. It will melt the blue rubber top and bottom. I forgot and left it soaking for 4 days, and it did melt the rubber and had to throw it away. Follow the instructions and it'll be good.