Cobalt - MJ Series | Multi-use Submersible Pump and Power Head

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Size: 600
Sale price$47.99
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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.


  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. 1/2” OD output connection
  9. 3/4” OD intake connection

Cobalt Aquatics MJ Powerheads Comparison

Model Flow Rate Max. Head Pressure Watts
MJ400 106 GPH 29" 5
MJ600 160 GPH 53" 7.5
MJ900 230 GPH 46" 8.5
MJ1200 295 GPH 69" 20


*Information as per manufacturer

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Into the Blue signifies a passion for education and sustainability. We believe providing environmentally friendly alternatives to purchasing wild stock in the hopes of helping our industry and revolutionizing aquaculture.

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As part of our commitment to quality, Into the Blue fish undergo vigorous screening by qualified marine specialists to ensure only the healthiest species are delivered to our customers. Fish are treated in premium grade facilities for internal and external parasites, including flukes, lice, nematodes, cryptocaryon, brooklynella hostiles, velvet disease, hole in the head and more. This helps ensure the best success rate in your aquarium environments. Less stress on the fish, the environment, and on you!