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 2.8 out of 5 by 33.
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
Rated 1 out of 5 by from It runs in reverse (Marineland Maxi Jets 1200) I bought this a year ago at PetSmart. I am using this for water circulation using part 6 and 7. The Properler runs sometimes in reverse. I clean it several times and still runs in reverse.
Date published: 2017-02-20
Rated 4 out of 5 by from Little to no air coming out I bought this maxijet 400 about 4 months ago and it worked fine with the air coming out. Now the only time I get air is when I have the pump basically right at the top of the water. Any help would be much appreciated thanks.
Date published: 2017-02-15
Rated 4 out of 5 by from Work Good But.... I love this product, I have it working on my 55 gallon Marineland start up i purchased on December 2015,I purchased the 600 model about 8 months ago, It was working as the wave maker set up but about two months ago when i switch to the power head with the air tube connection it work good for a while but now it make a grinding sound, if i switch back to the propeller stile it works fine no noise at all. Really don't know what to do to fix it if you guys could I would appreciate a help.
Date published: 2017-01-18
Rated 5 out of 5 by from Maxi-Jets purchased a Maxi-Jet 400 about 10 months ago for 30 gallon tank. still performing like new. these are the best line of powerheads out there for the money. I will be purchasing additional ones in the near future.
Date published: 2016-09-05
Rated 5 out of 5 by from Great Pump for $ Great little pump for the money, very versatile. Also big thank you to Mainland. Had an issue with one of the new pumps, called customer service, they tried to troubleshoot - sent out new pump; very kind, helpful and courteous!
Date published: 2016-02-24
Rated 5 out of 5 by from maxi jet 1200 I have this in a powerhead set up with my undergravel filter. Works amazing
Date published: 2015-12-21
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Please quote the price of Marineland - Maxi-Jet Multi-Use water pump 1200 Thanks.

Asked by: Sik008
We appreciate your interest in this product, but we don't sell direct. Please visit your local fish store. For listings in your area, click on the Buying Options tab at the bottom of the page. BREX
Answered by: BREX
Date published: 2017-12-12

I have a 35 gallon hexagon tank what size should I use?

Asked by: GLENNA
That depends on what you wish to achieve, but with that tank I would put a powerhead down at the bottom of the tank to improve water flow in that area, and the 600 would work well unless you have live plants or delicate inverts. BREX
Answered by: BREX
Date published: 2017-11-30

is the power head recyclable? Or just toss it?

Asked by: Ronald2
Yes, it should be recyclable. BREX
Answered by: BREX
Date published: 2017-11-29

Hi. I have 3 maxi-jet powerhead (400, 200, and 1200). After storage for some time, I tried to run it but the impeller won't spin (even when cover removed), and sometimes intermittently. Motor appears working because I feel some vibration.

Asked by: Charlie2017
Usually, when filters or powerheads are stored dry, the impeller separates. You may need new impellers. BREX
Answered by: BREX
Date published: 2017-10-30

Set up pump for use on a sluice box

Asked by: JMcD
The manual for the various methods of installation for this pump is available on the product page of our website. BREX
Answered by: BREX
Date published: 2017-10-16

I’m putting under gravel jets in my 60 gal tank they will be made with 1/2” inside diameter pvc tubing.  What size pump (maxi-jet, or other if more appropriate) would you suggest would be best?  The tubing from the pump will branch into 3 or 4 outlets.

Asked by: Jeff B2
Powerheads cannot be used to operate several items, like what you are suggesting here. So you would need an air pump instead. 1/2" tubing is pretty small, most undergravel tube are 1" - 1.25" in diameter. In order to operate more than one tube with only one pump, we would recommend the Tetra Whisper 60 or 100 models. BREX
Answered by: BREX
Date published: 2017-10-12

hi i recently purchased a ml maxijet 1200 from petsmart to replace the dead cobalt maxi1200 for my seaclone skimmer problem is this pump is so rediculously loud i cant hear myself talk and does not seem to have enough flow to make skim like cobalt????

Asked by: eric van vleck
Make sure you are using it in the impeller mode, as that is the proper mode for use with the Seaclone Skimmer. And of course, the powerhead should be submerged. You may want to email us details on your installation and set up so we can make sure everything is connected correctly. BREX
Answered by: BREX
Date published: 2017-08-14

this pump runs in reverse. why? I purchased it to circulate the water

Asked by: yolonda
If you are using the propeller instead of the impeller, yes, it is designed to run in reverse in propeller mode in order to obtain the crazy flow rate. BREX
Answered by: BREX
Date published: 2017-08-10
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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