FREE shipping on orders over $ 49

Cobalt Power Head

The Original MJ Pump / Powerhead

Multi-use submersible pump and powerhead is built to preform and last under the harshest conditions. Ideal for wave makers, protein skimmers, calcium reactors, nano aquariums, under gravel filters and hydroponic applications. 


  • Easy to use
  • Long life
  • 6ft cord
  • Fully rotational output
  • Fully sealed intake for internal and external use
  • Universal intake tube
  • Adjustable hanger with cord guide
  • Adjustable venturi with silencer
  • Triple suction cup mount
  • Large intake screen for use with sponge
  • Rounded intake screen 
 Model W Max Flow Max Height
MJ 1200 20 120v - 60hz 295 gph 69 in


Customer Reviews

Based on 5 reviews
Water Changes

Water changes are a breeze with this pushing water back to the tank. Carrying way less buckets now.

Cobalt powerhead

I think the cobalt power head is my favorite. Done with the RIO units. They are flimsy and fall apart just by handling them in the tank.

Great for speeding up water changes

I have a 125 gallon discus tank where I change 40-80% of the water each day. I have a 44 gallon trash can that I age my water in and with this little thing along with some rubber hosing from Home Depot it speeds up the process like no other. Great power head and I've not seen any issues with it yet.

Cobalt powerhead

I think this product works well it seems to move the water around my 75 gallon tank well I like the fact that you do not have to hook it up to a bubbler because it comes with an air release tube the package arrived in great condition and the product was brand new thank you again aquarium Co-op great job

Versatile reliable

I am using this powered in a large cichlid tank. I have it running a diy sponge filter. Works great picks up a lot of fines from the water and adds just the right amount of circulation. Very strong and reliable.