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Cobalt Aquatics MJ400 Multi-Purpose Powerhead/Pump

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$33.99  


3C00057

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Cobalt Aquatics

The Original MJ multi-use submersible pump and power head is built to perform and last under the harshest conditions. Ideal for wave makers, protein skimmers, calcium reactors, nano aquariums, under gravel filters and hydroponic applications.

Includes:

    1. Fully rotational output
    2. Fully sealed intake for internal and external use
    3. Universal intake tube
    4. Adjustable hanger with cord guide and 6ft power cord
    5. Adjustable venturi with silencer
    6. Triple suction cup mount
    7. Large intake screen for use with sponge
    8. Fits 1/2" ID vinyl tubing

Model Watt
120v-60Hz
Max Flow
(gph/lph)
Max Height
(in / m)
MJ400 5 106 (400) 29" (.73m)
MJ600 7.5 160 (600) 53" (1.35m)
MJ900 8.5 230 (870) 46" (1.17m)
MJ1200 20 295 (1100) 69" (1.74m)











Manufacturer Info

On April 26th, 2011 Viral Surati, Randy Parham and Les Wilson set off for the adventure of a lifetime. The three hardcore fishgeeks set off to create an aquatics company of their own. Based in the values instilled in them by mentors of company`s past and lessons learned from a lifetime of fish keeping, Cobalt Aquatics and it sister brand Cobalt Pond were formed. Starting with a line of koi food proudly made in the USA and Equipment made in Italy, Cobalt Aquatics will always strive to bring the highest quality products to market.

25 Reviews

MARK OSUGI from TUCSON, AZ UNITED STATES

05/11/2016

Experience Level: Intermediate

CA reactor feed

Used as a CA reactor feed pump. Works great. No problems.

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ARMANDO HERNANDEZ from HAMMOND, IN UNITED STATES

04/03/2016

Experience Level: Intermediate

Great little pump

Pretty quiet pump. I used the suction cups to keep it in place. I have a couple of these and they do a great job for the amount of flow they push out and work well with valves for adjusting flow. Perfect for GFO or Carbon, but I may consider a bigger pump for biopellets.

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EDWARD BONADIO from Gilbert, AZ UNITED STATES

10/30/2015

Experience Level: Intermediate

Great multipurpose pump

Great for water changes and water movement for my 37 gallon reef tank. Every small aquarium should have this pump/ powerhead.

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JERRY SPEERS from HARRISON TOWNSHIP, MI UNITED S

07/31/2015

Experience Level: Beginner

Problem Solved

I contacted MD to ask if I could upgrade the pump that came with my JBJ 24g Nano. I needed better water flow. I was promptly given some options and chose the Cobalt Aquatics MJ 1200. It comes with instructions, however, you won't need them. It's supper easy to install and is vary quiet. Problem Solved...Thnx!

2 out of 2 found this review helpful

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WALTER D MANN from MYERSVILLE, MD UNITED STATES

06/10/2015

Experience Level: Intermediate

Using on next reef mr1

Using as a pump for my phosphate and carbon media in my next reef mri Seems to work well and powers media flow great.

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CHRISTOPHER STEELE from Port Saint Lucie, FL UNITED ST

03/24/2015

Experience Level: Intermediate

MJ1200

I wish it would have come with "some" tubing for the sump...can't have it all... Great, quiet pump.

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NILO GELLEGANI from Northridge, CA UNITED STATES

02/03/2015

Experience Level: Beginner

MJ pump

I'm satisfied with the performance so far...

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matthew herlan from northville, NY UNITED STATES

01/08/2015

Experience Level: Expert

Cobalt mj 400

Excellent product, well made, quiet, runs my calcium, gfo and carbon reactor. An excellent value

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STEPHEN ABRAHAM from QUEENS, NY UNITED STATES

06/02/2014

Experience Level: Intermediate

Cobalt mj1200 p/h

It's excellent for bed filters IAM using 3 MJ1200 power heads for my 150g tank it's works good I don't have any nitrate problems it's almost 5 months My tank is loaded with 24 kinds of fish and I Feed them 6 times a day.

2 out of 4 found this review helpful

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MICHAEL TURKSMA from COLLEGEVILLE, PA UNITED STATES

03/01/2014

Experience Level: Expert

Seems as good as old Maxi-Jet

Seems as good as the old "Maxi-Jet" branded power heads w/ a couple new features such as an o-ring on the impellar housing. So far so good. Time will tell.

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