MarineLandPA0114-03 Bonded Filter Sleeve for Magnum 350 Canister Filter, 3-Count

These work and fit exactly as they should. They definitely filter out a bunch of junk that's floating around in the tank. Of course, the rate at which they get dirty will all depend on the bioload of your tank, but since the Magnum filter housing is clear, its easy to see when its time to service them. These are easily reusable- i just rinse and wring them out a few times in a bucket of my waste aquarium water from my water changes and then put them back in. The also act as the bio medium for the filter, so I would definitely suggest reusing the same one for as long as it is holding up. I have two magnums filtering out my 125g freshwater community tank, and both have had their filter sleeves for over 6 months each now. I rinse out each canister once a month, but i will only service one at a time, and then the other two weeks after that... rinse, repeat. Never had any flow issues, but then again, its definitely good practice to not let your filter get so dirty that it gets that clogged. Would definitely buy again if i needed a replacement.

My magnum filter needed some attention and my filter sleeves were gone or shot. I ordered these on Amazon since I couldn’t find them in stores locally. They came quickly and were exactly what I needed. They fit well and my tank is crystal clear now.

Had to trim about an inch to fit my older aquaon canister. Marineland bought them but doesnt sell replacments for that company.Filters work great.

This sized sleeve for the Magnum 350 filter is a perfect fit for both of my fountain pumps. I wanted a filter that would fully enclose my pumps in order to keep them clean and unclogged from garden debris. While not the correct application, these sleeves work excellently. My fountain pumps are roughly 4" long x 3" wide x 3" tall.I sewed one end of the sleeve closed. Holding the pump with the delivery tube pointing up, I pulled the electrical cord up the side of the pump in the same orientation as the water delivery tube. I pulled the filter sleeve over the 4" x 3" base of the pump, fitting it like a tube sock. The hose and electrical cord are free coming out of the top opened end of the filter.My pumps have not developed that slimy build-up and run trouble free. The filter quality is excellent.

As expected

Had to finally change out all my filter sleeves and this was the best priced package. Filter floss is factory specified and fits perfectly. I normally use a set of 3 sleeves so that one is on the filter being used, one is has been removed, cleaned and is drying out, and the third is being set in the sun to give it a good UV cleaning. Just rotate them every other month to keep the magnum cleaning power proper.

I regularly buy this product because I have one of the older canister models that is not a hanger on the tank H.O.T model. Are use these filters for my magnum 220 canister filter, just like the 350 filter they both are underneath the tank in the cabinet. This is a great product and there are usually the cheapest on Amazon over Petsmart you can expect to pay two or three dollars more at Petsmart versus Amazon and these are great filters. Depending on how dirty your tank is this three pack of filters will last you 3-6 months of filtering.

I ended up getting the Magnum 350 in a garage sale for almost nothing, having to have filters to get it working, the only ones available seem to be these by the pump's maker. I wish these was cheaper, especially having to buy carbon as well.But I should note, I am using the pump and these filters with a freshwater setup; I don't know if it's my tank setup, or this filter per say, but Marineland's instructions says you shouldn't have to replace these filters until every month, in my experience so far, these become dirty within a couple of weeks, and if you leave it for a month (you should never wait a month to change a filter) it will stop the flow of the pump.

Bought this filter for my turtle tank. I had to cut to size but it works better than the original filters!

Been using these in my Magnum 350 for years.

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replacement part works fine