Cobalt MJ Multi Purpose Pump

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  • Regular price $47.99

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


Flow Rate

Max. Head Pressure


MJ400 106 GPH 29" 5
MJ600 160 GPH 53" 7.5
MJ900 230 GPH 46" 8.5
MJ1200 295 GPH 69" 20