HOT Magnum® Filters

Experience the benefits of a new aquarium filter; Marineland offers canister filters and hang on tank filters.
  • Experience the benefits of a new aquarium filter; Marineland offers canister filters and hang on tank filters.
  • HOT Magnum® Filter 250
  • Experience the benefits of a new aquarium filter; Marineland offers canister filters and hang on tank filters.
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Hang On Tank canister filters are ideal for maximizing space inside your aquarium.

HOT (Hang On Tank) Magnum® is an efficient, powerful, compact canister filter that is lightweight enough to hang directly on the back of your aquarium.

Because it is a Magnum, it comes feature-packed with the ability to convert with ease from a continuous duty mechanical and chemical utility filter, to a water polishing filter with micron filtration capability. Comes complete with a Carbon/Media Container and Water Polishing Micron Cartridge, and it is available in models with, and without BIO-Wheel wet/dry filtration.

HOT Magnum® Filters is rated 3.9583 out of 5 by 24.
Rated 5 out of 5 by from Love this filter My filters are still going strong after 20 years. I have filters that do not have the on/off switch. That switch causes more problems. It goes out too soon. I will stick with my old filters without the on/off switch.
Date published: 2016-05-17
Rated 5 out of 5 by from This product rocks I love all the products I have used and continue to use
Date published: 2016-01-22
Rated 5 out of 5 by from Long standing product made better with switch on off. This filter been out for long time. It's a great help and even does gravel vac. Love micron filter because you can keep reusing after cleaning. Never tired of this filter. Believe me I've tried all of them. I like bio wheel attachment also. All around filter for all passion. Great cleaning, filtering, great for bacterial set up. Thank you Marineland.
Date published: 2016-01-19
Rated 5 out of 5 by from Best Bang for the Hobby Buck Ive purchased these filters for as long as I can remember.
Date published: 2016-01-11
Rated 5 out of 5 by from Brilliant product Over 12 plus years while on holiday in Florida I have bought five H.O.T. Magnum filters. They are all still in operation in my fish house. As they are on UK 230v mains I employ a 110v transformer. They are extremely efficient with a superb output.easily cleaned and moved from tank to tank as required. I am also still using the original rite size filter sleeves. I am however disappointed to read that it is now discontinued but look forward to seeing its replacement which will be hard put to equal the performance and reliability of the Magnum. (I have 30 tanks)
Date published: 2015-12-30
Rated 5 out of 5 by from HOT Magnum Pro I've been using this filter for over 20 years and love it. It's easy to clean and service. The bio wheel works awesome.
Date published: 2015-12-21
Rated 1 out of 5 by from I thought this filter would work great for me. I was wrong. I bought this filter after my magnum 330 finally died after about 30 years. I have never been so disappointed in a purchase.
Date published: 2015-02-22
Rated 5 out of 5 by from Excellent filter that does a little bit of everything! I have had this filter for many years. Everything about this filter is awesome. One of the "features" that nobody mentions is water changes. I turn the filter offf, direct the output hose out of the aquarium and just hold a bucket under it till it is almost full and then hit the power switch on the back and empty. No more dipping buckets, cups, etc. into the aquarium. Water polishing and a media basket just round this out so I can use whatever media I have at home. Mine has lasted forever save having to get a new impeller once.
Date published: 2015-01-03
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Why was the hot magnum discontinued?

Asked by: koitoy
Marineland strives to create innovate, quality products, and we felt it was time to bring something new to the table. Therefore, we came out with the Magnum Internal Polishing Filter, and discontinued both the Hot Magnum and the Magnum 350.BREX
Answered by: BREX
Date published: 2016-05-17

I am trying to locate one and buy it for my tank, I live in Dallas Texas, dose any one know where I can find one and buy it, Thank you for any help on this

Asked by: roger williams
This is a discontinued filter. You would need to enter your zip code in the dealer locator and contact the various stores in the Dallas area to see if any still have it in stock or not. It was discontinued less than a year ago.BREX
Answered by: BREX
Date published: 2016-05-16

I can not find any one who sells the hot magnum filters. Where can I buy one?

Asked by: Mark3
This is a discontinued item, and is no longer available.BREX
Answered by: BREX
Date published: 2016-05-11

 For some reason I cannot get mine to run properly The bio wheels run for a day or two and stop  it's just not running correctly and I need help I've done everything I know to do done everything in the book to troubleshoot

Asked by: HMC1984
The best thing to do is call in with the filter in front of you so we can do some troubleshooting and have you try a few things while on the phone. 1-800-322-1266. However, here are some tips:- remove impeller and clean it, and the bottom of the canister with distilled white vinegar, Soak the impeller for about 20 minutes- maintain water level in tank at top of the tank- remove vinyl tubing and either replace it (depending on age) or clean it out.- clean intake tubing out- remove bio wheel, and take a qtip and very gently wipe the excess sludge off of it, clean bio wheel bearings and lube them with silicone lubricant.- check or replace D ring, o ring on intake tube.BREX
Answered by: BREX
Date published: 2016-04-27

Is the Marineland model 250 magnum h.o.t. canister filter (Product (3465) still available. If so. where can it be purchased?

Asked by: seabiscuit
No, it is discontinued, and no longer available. It was a recent discontinuation though, so some smaller, local type fish stores may still have some in stock, but the big chains are out of stock, permanently.BREX
Answered by: BREX
Date published: 2016-04-25

Is the HOT Magnum still available? My second one just stopped working and I cannot seem to find a replacement one anywhere.

Asked by: cctx
No, unfortunately, it was discontinued a few months ago. There may still be some for sale at local shops, but all of the major ones are probably permanently out.BREX
Answered by: BREX
Date published: 2016-04-25

I have used the same hot magnum for my 50 gal tank for the last 15 years. It recently is experiencing plastic fatigue. I have tried to find a new one but have found it unavailable. Particularly petco has said it was discontinued. Where can I find it

Asked by: Mdunn
It has indeed been discontinued. There may be some still on shelves because it was a recent discontinuation, less than a year, but you would need to search local fish stores, not chain stores. We do have something better coming out, but it is still in the works.BREX
Answered by: BREX
Date published: 2016-04-21

what is the diameter of d-ring cover seal( thickness) and type of gasket material is it constructed from. o ring inlet/outlet  what is the diameter and thickness and material type thank you

Asked by: akimak
The D seal is a custom molded gasket made of silicone with a nominal XC of 0.0140”.The o-ring is made of Buna-N or Ethylene-Propylene with a nominal ID of 0.0426” and a XC of 0.070”.BREX
Answered by: BREX
Date published: 2016-04-06
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HOT Magnum Manual

HOT Magnum Quick Set Up Guide


Product Flow Rate Aquarium Size
H.O.T. Magnum 250 250 GPH up to 50 gallons
H.O.T. Magnum 250 Pro 250 GPH up to 50 gallons