Magnum 350 Canister Aquarium Filters

Product No. PC0350C
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The only filter of its kind with a patented flow through design, and self-priming, bottom-mounted motor. The Magnum® Canister Filters are the ultimate choice for both everyday utility filtration and water polishing.

The Magnum’s versatility gives the aquarist the ability to convert from a continuous duty mechanical and chemical utility filter, to a water polishing filter with micron filtration capability with ease.

All Magnums come complete with a Carbon/Media Container and Water Polishing Micron Cartridge. Available with, and without, BIO-Wheel® wet/dry filtration

Magnum 350 Canister Aquarium Filters is rated 4.1707 out of 5 by 41.
Rated 5 out of 5 by from Great canister filter! I have been using Marineland's canister filters for years and really like them. Canister filters by rule, are a little bit harder to maintain than some other types of filters, but for "polishing" your water in your tank, this filter does that. I use the carbon filled cartridge with the fiber sleeve at first for a few months, then switch out the carbon with the polishing cartridge that comes with the filter. It keeps my tanks super clear and the water test great with all the test I use, probably more than most. It keeps my water changes to the minimum, which to me is great.
Date published: 2016-05-23
Rated 5 out of 5 by from Best for keeping your tank/fountain/pond clean I have been using Magnum 350 canister filters since 1985. There was a predicessor back then. I still have 4 of them in operation. 2 on a 135 gallon tank. The water is crystal clear, one on a large out door fountain that I keep gold fish in. I replaced the regular fountain pump with the magnum 350 filter and it keeps the fountain crystal clear so you can see the fish. And I just put in a small fish pond (liner) 10 foot by 4 foot x 2 feet deep. I had an older Magnum sitting around because I took down an aquarium when my son went to collage. It is working great. The magnets need replacing about every 8 years but that is expected for a moving part. Great Product. I recommend it. If you don't want too much maint. of your tanks you have to put the money into the proper filter.
Date published: 2016-04-01
Rated 5 out of 5 by from This guy is an idiot 1 - I've never use zip ties to to tighten the foam filter to the carbon basket. That is just silly. Just buy the proper filters for you filter and you can reuse them! It's actuality cheaper and beneficial.2 - Rinse the used foam filter in luke warm water but do not flush or squeeze all the bacteria from the sleeve. It is beneficial if you want to reuse the sleeve, which I do. If the filter is going to be reused in several different tanks (drain the canister and refill with the tank's water). Unless there is a major problem (infection or disease) this will have no adverse effect on the tank your are cleaning. Especially useful on new tanks or major water changes. Bacteria is our friend.3 - Always perform water changes in the amount you are comfortable with (3 or 4 gallons weekly), or on bigger tanks, maybe a quarter of the volume of the tank. But it is still better to replace a smaller amount more often that all at once.4 - I use the sleeves up to 3-4 times on several tanks weekly and I buy the fitted foam sleeves because they fit and aren't that expensive! Considering the investment that you have made in your tank(s), cutting corners for a buck or two just doesn't make sense.I have using a Magnum 330 for years, but it finally gave up the ghost. If you read this and have parts you would like to part with, please let me know. I'm probably going to up-grade anyway, but keeping a back-up filter in emergencies is gold.Dana
Date published: 2016-03-28
Rated 5 out of 5 by from Marineland-Magnum 350 Canister Filter I bought one of these years ago! It is hands down the best filters system that I ever owned! I wish that I could find a new one!
Date published: 2016-03-27
Rated 5 out of 5 by from Excellent Canister Filter Then and Now I had a Magnum 350 canister filter when I first got into saltwater tanks back in 1994. It was an excellent design then and still is now. Through the years I have been lured into other filtration systems, but after 22 years I decided to go back to my roots and buy a new one. Nostalgic, I know. But I had a great time setting it up and it took me back to the early days of my hobby. This is a no nonsense canister filter that does exactly what it's supposed to do. I hooked it up to a UV sterilizer on my 120 FOWLR and I love opening the cabinet to see it standing there dependable and strong, supporting me aquarium. Easy to clean, quiet, and it just lasts. Please keep this filter around for many years to come because it is a gem of the hobby for both fresh and saltwater use.
Date published: 2016-02-28
Rated 4 out of 5 by from Only dependable diatom filter on market. The weak point is the hinges on the canister, plastic always cracks
Date published: 2016-01-24
Rated 5 out of 5 by from Best filter owned! Marineland is awesome!!! I've used the penguin series on my smaller tanks and then upgraded to a 90gallon for my cichlids and bought this and have no regrets!! Thank you!
Date published: 2015-10-26
Rated 5 out of 5 by from Great product This filter system comes with everything you will ever need including cut off valve and clamps, hose clamps and mounting for almost any tank. Mine is 5 years or so old and works great no leaks, motor runs fine and pumps like new. If you can find one you will be very happy.
Date published: 2015-10-05
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Where can I order a replacement impeller or 2 right away?

Asked by: Merri
You can order those directly from our site, and have it ship within 24 hours:
Answered by: BREX
Date published: 2016-05-24

Can I get a marineland magnum 350 

Asked by: Kirk vaughan
This is a discontinued item that is no longer available.BREX
Answered by: BREX
Date published: 2016-05-11

I need replacement hoses, can someone tell exactly what siz I need or where to buy them, I'm on my second set coming in that doesn't fit>

Asked by: Jmoore9
I have the 350 from the 90's and know it's 5/8's ID but cant seem to find tubing thin enough.
Answered by: jmoore9
Date published: 2016-05-07

How to check or replace quick connector o-rings when there is a leakage on locking the ends of the hoses?

Asked by: Joe Greg
You would need to lock the quick disconnects and remove the entire filter to a bathtub or elsewhere that a water spill would not be a problem, then take them apart.BREX
Answered by: BREX
Date published: 2016-05-04

Is this filter good enough for a 220 gallon tanks

Asked by: shorty123
No, it is rated for up to 100 gallons. You would need 2-3 of these, depending on your stocking load.BREX
Answered by: BREX
Date published: 2016-05-03

I just recently purchased a Magnum 350 Convertible Canister Filter, and a Magnum 350 Diatomite Canister Filter. Do you have an instruction manual for these items? The videos I have found are not helpful.

Asked by: Ron100
They are one and the same, the Magnum 350, period. Instructions are downloadable right from our website. Here is a link:
Answered by: BREX
Date published: 2016-05-03

I have one. Its great. Looking for another one. Where can I get one?

Asked by: Debbers
Unfortunately, this item has been discontinued and is no longer available.BREX
Answered by: BREX
Date published: 2016-04-27

what is the price for the 350 system

Asked by: rusty o
Unfortunately, we do not sell direct, and that particular filter is discontinued. It was a recent discontinuation so you may still find it in some small fish shops.BREX
Answered by: BREX
Date published: 2016-04-26
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Magnum 350 Manual

Magnum 350 Quick Set Up Guide

Product Flow Rate Aquarium Size
Magnum 350 350 GPH up to 100 gallons
Magnum 350 Pro 350 GPH up to 100 gallons