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 3.0 out of 5 by 40.
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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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

I have a 50 gal tank using two Maxi-flo 600's that need replacing These are used for a two plate under gravel filter. Is this still the recommended type for this type filter? Should I add a third 600? Or maybe use two 900's instead? Thanks, Dennis

Asked by: Chromeboy
I would use either the Penguin 660s or the Maxi jet 600s, either are perfect for this application. BREX
Answered by: BREX
Date published: 2016-06-13

What is the voltage of your pumps. will the voltage be viable in Ireland @220 volts

Asked by: fod1
They are 120 volts, and no, they will not work at 220 unless you have an adaptor. Additionally, we do not sell direct, unfortunately. BREX
Answered by: BREX
Date published: 2016-06-06

Could you tell me what the difference between the maxi jet 1200 and the maxi jet 1200 pro is?

Asked by: Jacob55
The only difference is the packaging and the impeller. We made changes to the impeller in the past 6 months to a year. BREX
Answered by: BREX
Date published: 2016-09-18

I have an outdoor bird bath that requires a Submersible Pump in order to circulate water. I used a MN606 Mini-Jet. Today the wire casing cracked an exposed the wires. Is this the recommended pump or would you recommend something different ?

Asked by: Lew75
That is a good pump for that purpose, but it is no longer made. It was discontinued some years ago. We no longer make a small, submersible pump like this in the Marineland line. We do make the Tetra SP 140 pump, however, which is sold through garden centers and nurseries. BREX
Answered by: BREX
Date published: 2016-09-18

Hi if i use it as a sump set up like example 2 of the manual what GPH should i expect 295? thanks

Asked by: teufel
No, it does 295 gph at 0 head. That is the maximum flow rate in the powerhead mode. You would need to incorporate the amount of head you would have, which depends on the distance from the sump to the top of the tank, but it would be considerably less. BREX
Answered by: BREX
Date published: 2016-05-13

I have an 120 gallon aquarium, with under gravel filters, and wanted to purchase this pump to circulate water under the gravel. How many should I buy and what size? And also, do these come with the adapters to hook them into an undergravel filter?

Asked by: TheCrazyTurtleLady
Yes, they do come with the adaptors needed for hooking them to UGFs, and how many depends on how many tubes you want to hook up, but I would suggest at least 4 of them. To get 120 gallons of water turned over at least 7 times an hour, I would recommend the MJ900 as a minium. Four of these will give you 920 gallons an hour which is between the normal 7-10 times per hour recommended for turning over the water in an aquarium. BREX
Answered by: BREX
Date published: 2016-04-26

I purchased 2 maxijet pro 1200's. I was going to use them for additional circulation in my 10 reef. The one I opened is SO noisy i cannot use it in my tank. I have tried to re-seat the propeller many times to no avail..Please advise..Thank you

Asked by: Richy
As it starts up, it will definitely make some noise for about the first 10 seconds, then should go quiet. If you have it on a wave maker or something along that line, I would not recommend using it in that application. If you are using sand, unplug it and take it apart to make sure sand has not gotten up into it. Other than these tips, please call us so we can troubleshoot it for you. 1-800-322-1266. BREX
Answered by: BREX
Date published: 2016-04-13

Have a 39 gal eclipse show tank power head that disperses water across filter in hood is out do you have replacement? If so what is price? Thank you 

Asked by: Jeff b
Here is the item that you need: It will not come with an impeller or an impeller cover, so keep your old ones. The price is $39.06. I would recommend pulling the impeller out and cleaning it and the pump first, if you have not already done so. BREX
Answered by: BREX
Date published: 2016-04-11

Can this item be used as an external inline pump ? Thank you.

Asked by: Tonyette
Yes, it can. You can see a set of instructions on the website if you scroll down the Maxijet product page and click on Instructions and Manuals. BREX
Answered by: BREX
Date published: 2016-03-11

Will this pump works for my SeaClone protein skimmer model 150?

My SeaClone protein skimmer model 150 is on and off every other minute. I had replaced the impeller once and now the pump is working on and off. I wonder if this pump is compatible with my protein skimmer. I have 60 gallons tank with corals and fish.
Asked by: blezzedguy
That skimmer takes the Maxi Jet 1200 with a special adaptor. If you buy the powerhead as such, you will need to keep your old adaptor as a new powerhead will not come with one. Try soaking the entire powerhead in distilled white vinegar to see if this will remove deposits and get the powerhead functioning properly again. It still sounds like an impeller issue, but there could be deposits in the chamber the impeller resides in as well. BREX
Answered by: BREX
Date published: 2016-01-19

what size tubing (inside diameter) is this compatible with. i want to use it as a pump from a 55 gal drum to my tank for water changes.

what size tubing (inside diameter) is this compatible with. i want to use it as a pump from a 55 gal drum to my tank for water changes.
Asked by: jdf25
1/2" BREX
Answered by: BREX
Date published: 2016-01-18

maxi jet powerhead

i'd like to know how to choose a powerhead size? not sure if the 2 i've tried are good 55 gallon tank
Asked by: Jojo3
There isn't a real formula for choosing one. It is based on what you want to use the powerhead for in your tank. You can basically look at the gph of each powerhead, and go from there. Determine how much water movement you may want or your fish may tolerate. Also, do you want just one or are you placing one at each end of the tank? That affects what you choose as well. As it sounds like you want two, the 600 or 900 would work, again, depending on what they are going to do in the tank. BREX
Answered by: BREX
Date published: 2016-01-06

What are the specifications of the motor?

I'm curious as to what the specs of the motor are in this unit.
Asked by: Narwhal
Thank you for your inqruiy. However, we will contact you directly via email in regards to further information for the question that you have provided. MINI
Answered by: MINI
Date published: 2016-01-09

Maxi jet 900 External configuration

I would like to glue one attachment onto the inlet, what type of plastic is this made from? PVC?
Asked by: Matt001
No, it is made from ABS. BREX
Answered by: BREX
Date published: 2015-11-03
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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