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 2 out of 5 by from Cheap price, cheap product, lower quality..... i bought the 400 series power head and it wasnt long before i had the impeller break inside because it was cheap plastic and inferiorcasting. I bought 3...1 down in 3 months, stay tuned....
Date published: 2015-08-04
Rated 4 out of 5 by from Powerfull but breaks impeller when used with wavemaker I love this pump and recently purchased 4 of them for my 125 salt tank, I also wanted to use it with my wavemaker and so plugged all 4 into it and started them up. They were working just fantastic and kept the water in the whole tank moving and the tank was crystal clear, after about 3 weeks of use I started seeing algae growing on the rocks and glass so checked the filter media, that was clean.So I put my hand in front of the first pump and realized that it was running but pushing NO water, so checked the other 3, those where the same. No water movement from them. So took out the first one to see what was up, well, all of the wings on the impeller where broken off at the base, as where the other 3 pumps. Even though they advertise that they can be used with a wavemaker, I found that they can not. It has reached over the 60 day mark to have the impellers replaced so now have 4 not working and need to buy new impellers for all 4 before they can be used. And NOT with the wavemaker, which is what I wanted them used with. Wish they would put a warning on the information section that they will break if used with wavemakers, and stop advertising that they can be used with them.
Date published: 2015-04-08
Rated 3 out of 5 by from need magnet this design is in desperate need of a magnetic attachment solution. something akin to Tunze or Vortech
Date published: 2015-04-06
Rated 3 out of 5 by from good for circulation, poor impellers I had the 1200 set up as a circulation unit and it worked well enough, then when I added fish to my tank I set it up as powerhead for circulation only.. the impeller only lasted 3 hours! I went to a basketball game afer I set it up and when I got back there were purple impeller blades laying on my tank floor, and no circulation... cheap!
Date published: 2015-02-23
Rated 1 out of 5 by from Needs Improvement It has great flow when it works. I got it because of its multiple uses though its been in impeller mode for 6+ months now. I have it always on, it chatters on start up, and though thoroughly cleaned I keep finding it off at random times. The suction cups don't work worth squat. I tried using it as a circulation pump in the display but it would fall off almost daily and end up blasting my coral or flinging sand in the water collumn. I regret this purchase.
Date published: 2014-11-14
Rated 2 out of 5 by from Air intake does not stay attached Poor design for the attachment of air intake. Needs to be a tighter fit or seallant must be used to attach the air intake. A small design change could eaisily fix this.
Date published: 2014-11-12
Rated 2 out of 5 by from Never stays up Pump works good but I hate it because it never stays up, the suction cups keep it up for maybe a few days then I find it on the bottom churning my tank up. If they could design one like this that doesn't use suction cups I would totally buy it
Date published: 2014-11-07
Rated 1 out of 5 by from Flimsy impellers Bought 2 - 1200 pumps several months ago and both impellers are already broken.Now trying to buy replacements and their out of stock.
Date published: 2014-10-17
Rated 2 out of 5 by from Very noisy The power attachment is ok, but with the laminar attachment it vibrates,and is TERRIBLY noisy!!!
Date published: 2014-08-31
Rated 2 out of 5 by from junk mp1200 is junk bought 2 last 6months never again spend the xtra $ on better products
Date published: 2014-07-04
Rated 3 out of 5 by from Works well when working Maxi-Jet 1200. When I first bought it to create a current in my tank - I thought - wow this thing works great and water circulation has improved a ton and its actually quiet. After about 6 months into it I noticed some noise. Took her out to clean and noticed some uneven wear in the cavity holding the magnet in the impeller - (really soft plastic). Now after 1 year the impeller literally fell apart with wear on the plastic parts. I bought a new impeller, but the motor now heats up and shuts off in auto protect mode after running for less than 10 seconds and then powers on after about 30 second rest for another 10 seconds. Not sure what is causing so much heat to be generated in the pump. its not shorting since the GFCI plug has been tested and is not being tripped. They need to make the pump out of better materials. The excessive wear on the impeller and housing, is not acceptable. I've used other power heads for much longer periods without issues. Love the ability to use this pump as a utility pump, powerhead or current maker, but its longevity leaves a lot to be desired.
Date published: 2014-07-02
Rated 5 out of 5 by from Great Customer Service This is a followup from my review on June 1, 2014 on the 1200 Maxi-Jet pump. I was contacted by Barbara Link, with their customer service group shortly after my review and she was highly concerned with the comments I had made. We sent several emails back and forth in a short amount of time and worked through the issues. I received a new pump from her and this one works like a charm. I want to applaud Marineland for their quick response to a customer problem, and even quicker solution. I have purchased Marineland products for over 30 years and will continue to do so for these reasons.
Date published: 2014-06-18
Rated 1 out of 5 by from Product becomes loud overtime My Maxijet 1200 barley works after a little over a year, I've cleaned the impeller multiple times as well as replaced it and it still manages to get clogged & literally just stops working. I've wasted money on lights, filters, & powerbeads with marineland & wouldn't recommend this product. Invest more money and get a Hydor powerhead or a Tunze.
Date published: 2014-05-07
Rated 1 out of 5 by from I've bought two in two years I have a 180 marine tank. I bought my second 1200 Maxi Jet to run a reactor in my sump about 6 months ago. It worked fine in the beginning, now it runs, but does not pump strong enough to push water through the tubing into the reactor. I've tried everything now and can't get it to pump strong enough. It spins, I even tried priming the tubing etc as someone on here suggested but with no luck. I've spent 3 hours tonight trying to get it to work with no avail. Anyone have any suggestions on what to do?
Date published: 2013-10-03
Rated 5 out of 5 by from For its small size, it makes a great wave maker for a small tank I purchased this for its wave making function. It does a good job with shallow, but long tanks.
Date published: 2013-08-14
Rated 2 out of 5 by from Air Bubbles From UGF Causes Cavitation I have a 125G Salt water Tank with under-gravel-filter. I chose the Maxi Jet Pro Power Head upon recommendation from the LFS. Once the Nitrogen process is established it by nature creates air bubbles. The power head pulls the air up the lift tube causing the impeller to create a large volume of micro-bubbles. This causes cavitation within the impeller housing and the power head loses suction. The fins on the impeller are in a vertical formation on the shaft, as a retired navy man I can assure you there is a good reason that propellers are angled and not vertically fixed on a shaft. Vertical fins are not efficient at water displacement or lift. That is simple fluid dynamics, especially when air is introduced to the lift tube. Please consider a design modification for your impeller with angled fins.
Date published: 2013-05-28
Rated 1 out of 5 by from 2 major issues 1. they just don't stay stuck on the glass and 2. after few months(happened 3 times) they circulate in reverse and water blows out the side and of course can't return to pet store I bought them at too long from purchase.
Date published: 2013-05-24
Rated 2 out of 5 by from Noisy Pumps I just replaced a failed Maxi-Jet 1200 and I'm not happy with the new design, for one the previous unit had a 3 prong plug (ground) the new one doesn't which isn't a big deal in itself, but makes me worried that they went cheaper on the new unit... secondly, this is a noisy pump. I don't mind them going with slightly cheaper parts to save on the build, but I can't deal with the noise of the pump... I'll have to look for a new one... sorry guys!
Date published: 2013-03-29
Rated 5 out of 5 by from great powerhead for the money Using as a powerhead for my 55 gallon fowlr tank and it performs exactly as it should. dont understand the negative reviews on here...I love it, fish love it.
Date published: 2013-03-08
Rated 1 out of 5 by from Buyers Beware Not good at all. i bought 2 of the maxi-jet 1200 pumps and i first set them up as circulation pumps but they are so loud. i switched it to the smaller impeller and the fins broke off of them within 1 day and i know i put these together right, i have put together lots of powerheads. very bad construction. i would for sure not recommend this product at all. i just got back into aquarium stuff and marineland products used to be good. i can't speak for everything but this one is bad!!!! i hope that marine land does the right thing and contact me about this issue.
Date published: 2013-01-09
Rated 2 out of 5 by from Not as good as the old ones. I've used Maxi-Jets for years in a pair of semi-custom 60g tanks as a partially submerged power head. They were quiet and efficient and, best of all, worked equally well when the water level dropped and they were out of the water. But they didn't last forever, so I bought two of the new models as replacements. I was very disappointed to find that, while they still perform well enough in my application, they are no longer quiet.I tried to live with them, but after a few months, the continuous loud hum from the new ones proved too much for my nerves, so I reluctantly replaced them with something else. They may be fine submerged, but no longer are for my use.
Date published: 2012-11-24
Rated 1 out of 5 by from Poor Design & Construction I bought several of the Maxi-Jet 1200's for my 300 gallon live rock grow out system because they were I know why. First off, these units are huge for the little water flow they produce. The openings in the impeller screen are far too big and chew up anything that gets near them. I can't tell you how many fish and inverts I've lost to these pumps. I've used nearly every powerhead currently on the market and these are the only one's with that problem. They are very noisy and the impellers tend to get stuck as well. I will definitely never purchase these again. I've stopped using the one's I have as I'm tired of finding my livestock dead.
Date published: 2012-02-15
Rated 1 out of 5 by from Terrible for my Application I bought a maxi jet pro 400 to use as an external pump to drive water through a small nitrate filter and it flat out doesn't work. Marineland markets this pump as a 3 in 1.......powerhead/water circulator/utility pump. It even shows in the instructions the pump used externally (non submerged) Okay, problem with this omni directional mount leaks, or more so, all it does is suck air in around it.....that's fine (well not really) if its submerged, works fine as water circulator and great as a powerhead, but use this pump out of the water it sucks so much air around the omni directional mount that it can't even pull water the length of 3 inches! That is totally ridiculous. Marineland makes some very fine products I just wish they were more up front with the capabilities of this pump, external utility pump is one of their selling points. Wasted my money. Needed EXTERNAL pump.
Date published: 2011-09-20
Rated 5 out of 5 by from Great product The maxi jet 900 is awesome! I have 2 for my 55 gallon and the fish and corals love it! Had issue with my first one and Marineland sent me another one free of charge. Great company and great product! Will be buying other products when I get a 100gallon tank.
Date published: 2011-07-27
Rated 5 out of 5 by from Great pump, but NOT WAVEMAKER using PROPELLER I've been using these pumps for years to alternate the flow direction in my reef tank (a.k.a. Wavemaker mode.) These pumps, using the standard impeller, do this well. They make one short "click" when started. The new propeller add-on chatters at start up, from one to five seconds. The propeller would make a great circulation (always ON) high volume pump but no way does it work with short duration (10 to 15 second) run times. It takes way too long to engage, making a loud racket the whole time. Be careful, as some vendors are labeling the propeller configuration as a "wavemaker." Note: I had previously tried the after-market add-on propeller kits, and they had the same problem. Marineland: great product; need to figure out how to "soft start" the pump.
Date published: 2011-05-07
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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

Can I run a Maxi Jet 900 power head above the water line?

Asked by: poolside57
Thanks for asking, poolside57. You cannot run the power head above the water line.
Answered by: Customer Service
Date published: 2017-08-08

I had 2 Marineland filter pumps - PFE2 20 Vac, 60 Htz and 17 Amp, they both bit it due to aquarium was leaking and they ran dry and froze up. They hook up on top canopy and run water into a long blue filter on each side. Do you have anything comparable?

Asked by: Darog
That is the Eclipse 2 and was discontinued about 6-7 years ago. The motor is no longer available for it You would need to replace the entire system. We are working on something new, but it will not be out till 2018. BREX
Answered by: BREX
Date published: 2017-08-03

Do these products have the ability to be adjusted... is there a range of power for the flow?

Asked by: Qxs8363
Not in regards to the flow rate, no. They are multi-directional, however, so you can set the direction the flow will move in. Also, you can elect to have air bubbles or no air bubbles. BREX
Answered by: BREX
Date published: 2017-06-07

i am currently trying to find a user manual for a magnum 350 filter. any help? thanks.

Asked by: DDAANNOO
I have emailed this to you. BREX
Answered by: BREX
Date published: 2017-06-01

how do i replace the impeller on the polishing filter pump?

Asked by: Mike Aaron
Hi Mike, If you have the Magnum Polishing Filter, it uses the Maxi Jet 1200 powerhead. The filter is a new item, and the impeller is under warranty. I will email you directly. BREX
Answered by: BREX
Date published: 2017-06-01

I have a small '10gl' tank at work, and I need a small power head for it, I have an Aqua-Tech 170gph power head but I have to turn it off when I leave because I think it will exhaust the fish. is there a smaller version? I love my powerhead!

Asked by: Neoma
Hi Neoma, No, that is the smallest one that we make. You might add a sponge filter to the intake of it to reduce the flow somewhat or switch to an air stone instead. BREX
Answered by: BREX
Date published: 2017-05-31

How do these power heads work?

Asked by: Sonny 539
They work like any other powerhead - they are to be submerged completely. If you wish to also have air bubbles, submerge them no more than 2", and leave the venturi tube and knob up out of the water. Otherwise, remove those, and cap off the venturi, then submerge them anywhere in the tank to increase water movement. Many saltwater enthusiasts use them to create water flow over their corals. BREX
Answered by: BREX
Date published: 2017-03-30

Is Marineland® Maxi-Jet Water Pump 1200 to strong for a freshwater water tank that is 60 gallons or should I with the maxi 400

Asked by: Smiley aka ronald
That depends on what you wish to achieve and what types of animals are being housed, but in most cases it would probably be too strong. You could certainly use the MJ 600, however. The 400 is pretty small for a 60 gallon. BREX
Answered by: BREX
Date published: 2017-04-09

I have replaced a power head for the third time,why does it rotate in reverse 

Asked by: Grrg
It runs in reverse for me also.
Answered by: MonitorTheMusic
Date published: 2017-02-20

I have a 29 gal tank, ugf with the Maxi Jet 1200 ph attached to the ugf tube. I have danios and black phantom tetras in the tank. The tetras seem to have issues swimming the length of the tank. Is this ph too strong? What size do you recommend?

Asked by: Natalie2017
Definitely too strong for this size tank! We would recommend either the MJ 400 or the MJ 600, maximum. BREX
Answered by: BREX
Date published: 2017-02-13

What are the dimensions of the pump?

Asked by: Eduardo Corrêa
That would depend on which size powerhead you were referring to, but they are approximately 110 cm tall by 90 cm wide. This includes the suction cup mount and the extension. BREX
Answered by: BREX
Date published: 2017-02-06

Can use a powered pro as a non-submersible pump for a D.I.Y. canister filter?

Asked by: Slick
We would need to understand more about your design, but it sounds like the application is not exactly what the unit is designed to do. BREX
Answered by: BREX
Date published: 2017-01-17

I have a sea clone skimmer with maxi jet 1200 on it and the blades on the impeller keep breaking off. I have replaced 3 in a year. Is this normal?

Asked by: Dale2121
No, your impeller blades should not be shearing off like that. Make sure sand, small pieces of crushed coral are not being pulled into the powerhead. BREX
Answered by: BREX
Date published: 2017-01-13

What size do you recommend for a 20 gallon long fish tank?

Asked by: vincentl331
Thank you for your interest in this Marineland product! That is dependent on what you are trying to achieve with adding one to your tank, but in most cases, the smallest one, the MJ 400. BREX
Answered by: BREX
Date published: 2017-01-04

Do you folks have a replacement pump for the MPSP300 skimmer?

Asked by: rhyno
Thank you for your question! Unfortunately, no, as the unit has been discontinued for some time, the replacement pumps are no longer available. BREX
Answered by: BREX
Date published: 2016-11-28

I have older maxi jet filters. I don't see it on site. Does the mj600 impeller work on the mp600 pump ??

Asked by: Rudy1996
Unfortunately, no, it will not. The new Maxi jet powerheads use a totally re-designed impeller these days. BREX
Answered by: BREX
Date published: 2016-11-14

Thanks Brex. I need one to fit in a sump.

Asked by: Suzie Q
No problem, any time! BREX
Answered by: BREX
Date published: 2016-10-31

I'm looking for a maxi jet to use in the summer of my aquarium however I need dimensions.  Can you give me dimensions of the 400 through the 1700?

Asked by: Suzie Q
Including the suction cup tripod, they are roughly 4" x 4.5". BREX
Answered by: BREX
Date published: 2016-10-28

Is the Pro 600 or 900 impeller cover outtake or output tube fixed in its position, or, can it be rotated in the horizontal plane to accommodate coupling to a Reverse Flow Elbow for an under gravel filter. The Reverse Flow Elbow has an i.d. of 7/8 "

Asked by: koolbreeze
It can be rotated, but is 1/2". BREX
Answered by: BREX
Date published: 2016-10-21

After reading through the Q&A's, I noticed that for proper operation of air bubbles the unit cannot be below two inches of the water level. Is this true, because it is not mentioned in any of the instructions or information. At least I cannot find it.

Asked by: JimA
Yes, this is correct. The further down you place it, the harder it is to pull the air into the venturi properly. BREX
Answered by: BREX
Date published: 2016-09-18

Can my power heads be all the way under water

Asked by: Fat Daddy122
Yes, they can; they are intended for submersible use. BREX
Answered by: BREX
Date published: 2016-08-29

Can you reduce the flowing the power heads. I recently downsized my tank and the flow is a bit too strong

Asked by: LoriD1
No, it does not have a flow control on it. You can change the direction of the flow, but not the power of it. BREX
Answered by: BREX
Date published: 2016-08-15

Power head didn't come with clear instructions. How do I set it up for under gravel filter

Asked by: Fishhead6162
Essentially, there is a long cone shaped piece that attaches to the bottom of the powerhead and rests on/in the UGF uplift tube. The suction cups and bracket should still attach to the glass panel of the tank. The powerhead should not be more than 2" down in the water, and the venturi adaptor should be attached and outside the tank, to draw air into the powerhead. Please call if you have any questions at all. 1-800-322-1266. BREX
Answered by: BREX
Date published: 2016-08-03

What Inside diameter tubing(s) are needed for the Marineland Maxi-Jet Pro 1200 to turn it into an inline pump??

Asked by: jenningske
1/2 inch. BREX
Answered by: BREX
Date published: 2016-08-15

About 3 months ago I purchased a Maxi-Jet 900 power pump that I use as a circulation pump. Can I get a an impeller replacement. The impeller that came with the unit does not turn any more, the impeller is broke

Asked by: Ackee Bud
If it has seized up, try soaking it in white vinegar for about 15 minutes, after removing any and all debris. If it is a manufacturer defect, such as the shaft snapping in half, contact us at 1-800-322-1266. BREX
Answered by: BREX
Date published: 2016-07-25

Hi there. I have a 40 gallon (36 inch wide. 18 inch depth and 17" tall) planted tank with tetras and gouramis. Which maxijet would best suit my needs for water circulation? Thanks.

Asked by: rastamanvibration
Plants normally don't like too much movement so I would probably go with the Maxi Jet 400. BREX
Answered by: BREX
Date published: 2016-09-18
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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