Maxi-Jet® Multi-Use Water Pump

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Product No. ML90509-01
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Maxi-Jet® multi-use water pumps are three pumps in one: power head, utility pump, and now featuring a circulation pump option.  Still the best power head for powering undergravel filters and running wave maker timers, as well as for running small fountains, calcium reactors and skimmers. 

The Maxi-Jet also contains an in-box conversion kit, which can turn the power head into a prop style circulation pump for ultimate water movement inside the aquarium--using the least amount of energy!  The Maxi-Jet is the most fully adaptable pump available.

Maxi-Jet® Multi-Use Water Pump is rated 2.9 out of 5 by 39.
Rated 4 out of 5 by from little pump but .. way too much power Great pump, I have a 65 Gallon tall, I need water moving, I enjoy you can make it either a jet or pump for flow. Thing I got worried about I bout the 400 and its blasting my tank all over. I can see this stressing my fish out! Wish there was a way to regulate the water flow it be a perfect system as it is I will only run it 20 mins a day... I think>?!
Date published: 2018-06-13
Rated 5 out of 5 by from I have lots of these We breed and sell fish. Lots of them. We currently have about 3,000 gallons of water under tank, tub and pond at the moment, and probably more than 1,000 fish at various stages of growth. We have thirty 40-gallon breeder tanks, a half dozen 75-gallon growth/breeder tanks, various other 55-gallon, 30-gallon and 10-gallon tanks, along with several 100 to 200 gallon stock tubs. We must have 50 of the Maxi-Jet 1200 powerheads that we use as tank polishers by attaching the cut-off tops of 16 ounce Pepsi bottles stuffed with floss to the intake of the powerhead. The powerhead draws the water through the floss and cleans it. A single powerhead can turnover the water in a 40-gallon breeder tank dozens of times per day. Our water is always crystal clear and clean. We just replace the floss every couple of days. The point is that we have used the Maxi-Jet 1200's 24-hours a day now for the nearly three years we have been involved with this breeding project/business and have had a sum total of one pump failure in all that time. That's it. One. I don't know about you, but I think that's a pretty darn good record. We wouldn't use anything else in our thanks for the purpose we're using them for. And for the between $20 and $25 you can get one for, to get all of those years of uninterrupted use out of them is a bargain in our view.
Date published: 2018-05-27
Rated 1 out of 5 by from very bad I bought a 1200 maxi jet two months ago and the cable that was in contact with the water oxidized and passed electricity to my aquarium. skimmer consequence I stop working, everything died. Do not buy this garbage.
Date published: 2018-05-12
Rated 4 out of 5 by from I like it I have had the Marineland Powerheads for a lot of years now! I have used them in many different compassity . They have never failed me and I`m looking to buy more.You have to clean them... like anything else....Thier the BEST!!!
Date published: 2018-03-14
Rated 5 out of 5 by from Great Product with an incredible warantee While defective pumps can happen occasionally, I always buy Maxijet pumps for all my saltwater applications... I recently received a bad pump, and in practically NO TIME had a new one on my doorstep. My tank is happy, the pump is working GREAT, and knowing Marineland has my back is a huge benefit that makes the purchase worth every penny!
Date published: 2018-03-07
Rated 5 out of 5 by from Best 3 in 1 on the market!!! I am currently using two 400, four 600, two 900, and have two 1200. For fresh water shrimp breeding tanks as water circulation devices on sponge filters and diy in tank filtration on all my larger twenty to thirty gallon setups.I have also used these pumps for water circulation in my turthe tanks and planted tanks. As well as using them for utility pumps to fill my tanks when setting up new aquariums.These three in one style pumps are by far the best bang for your buck on the market today. If used propely will last a lifetime, well maybe not a lifetime, but close to it.I highly recommend these pumps there amazing!!
Date published: 2018-01-21
Rated 4 out of 5 by from moves a good amount of water in my 75 gallon just installed it and didn't even need instructions for assembly only reason I didn't give 5 stars is I wish it came with a foam sleeve as I have small fish
Date published: 2017-08-12
Rated 1 out of 5 by from Broken Impeller after One Month Got the MJ400 to pump water in my small tank. One month of use and every single impeller blade is broken off at the base. So I have 6 little orange squares that I have to find in the tank now. Not satisfied with the quality of this product. I'm not running a crazy setup either. The pump is set about mid-way in the tank pumping water 2 feet higher. These should be MUCH more durable.
Date published: 2017-07-23
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Where can I buy a new rotor filter wheel for a Marineland Emperor 400?

Asked by: Charley 553
Hi Charley553! You can buy it here: BREX
Answered by: BREX
Date published: 2018-07-05

I have two new Maxi-jet 250's. Neither one works. Can I return them to you?

Asked by: Dan McMonigle
We do not make a Maxi Jet 250. Therefore, I'm not sure what product you own. Please call 1-800-322-1266 for further help. BREX
Answered by: BREX
Date published: 2018-06-26

What kind of maxi jet would you guys recommend? I just need it to make air bubbles for a 55 gallon tank and also as a water pump for water changes.  

Asked by: NCcichlids
Probably the 900, since you want to pump water for water changes as well. For air bubbles, the 600 would suffice. BREX
Answered by: BREX
Date published: 2018-06-19

Hi, I'm looking for a Maxi-Jet pump model MJ250.

Asked by: Godo
Thank you for your interest in our products, Godo! We do not make a model that small. BREX
Answered by: BREX
Date published: 2018-05-22

What part number for the C360 gaskets?

Asked by: Jack M 6
Thanks for asking! The part number is: PR11942-01. For more help call Marineland at 1-800-322-1266.
Answered by: Customer Service
Date published: 2018-05-15

need rite-size a 3 pack bio- wheel penguin power filter cartidge

Asked by: Ricky0017
Thank you for contacting us! Those are readily available at most fish/pet stores, but you can also buy there here BREX
Answered by: BREX
Date published: 2018-04-30

How do I go about purchasing a replacement suction cup mount for a Maxi-Jet 600?

Asked by: JMAG
This - Or this - BREX
Answered by: BREX
Date published: 2018-04-03

May I buy directly from you the products that I need :-))

Asked by: Sharon Wilson
We appreciate your interest in our products, but no, we do not sell direct. You would need to go through local fish or pet shops, as well as there are a lot of online vendors that carry them, such as Amazon, Pet Solutions, Pet Mountain, Chewy, That Fish Place and Drs. Foster and Smith. BREX
Answered by: BREX
Date published: 2018-03-25
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ML90509 - Maxi-Jet 400 - 110-500 GPH
ML90510 - Maxi-Jet 600 - 160-750 GPH
ML90511 - Maxi-Jet 900 - 230-1000 GPH
ML90512 - Maxi-Jet 1200 - 295-1300 GPH

 Maxi-Jets Manual


Power Head Mode 

Circulation Mode 

Utility Mode 





Max Head Height 

Maxi Jet 400 






Maxi Jet 600 






Maxi Jet 900 






Maxi Jet 1200