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So quiet By Josh on 12/15/2014Josh would recommend this product to a friendit is soooo quiet
Love these pumps. By Despairodyne on 11/26/2014Despairodyne would recommend this product to a friendI have about 6 of these atm and use them for transferring salt water and ro/di water from containers to tanks and to stir my salt making bucket.
If the Sicce pump I bought for my Nuvo 16 isn't quiet enough, I'm going to split the returns and use the smaller Cobalt MJ's.
Well worth the price.
beware leaking voltage By jonathan on 9/27/2014jonathan wouldn't recommend this product to a friendi had this pump running for 7 months feeding a reactor on my 75g, when i started having coral die. i tested and found it was leaking 110v into my tank!!!
i lost a bunch of sps and ricordia thanks to this pump...
use at your own risk....
i bought a dc pump to feed my return, reactor, and skimmer. months later i once again have sps and ricordia thriving. this pump cost me a bunch of beautiful coral and money.
Super quiet! By perry on 7/22/2014perry would recommend this product to a friendthe pump is one of the quiet things i have running on my system. I use it to run water throughout my UV sterilizer and it returns the water to the tank with no problem.
Really quiet, really powerful By Adam on 6/4/2014Adam would recommend this product to a friendI've only had the MJ1200 for a couple of days, but so far I'm really impressed. I see more in my future.
Great power head, good pump By Devon on 5/19/2014Devon would recommend this product to a friendI got this MJ1200 to use with the BRS canister reactor with carbon. It works very well and is the quietest pump I own.
I also tried using it as a sump return because I wanted to reduce the return pump noise, but the flow rate drops to 50% with only 2 foot head pressure.
I may end up using two as returns because they would still be quieter than one mag drive 3.
Good pump By Benjamin on 4/10/2014Benjamin would recommend this product to a friendI recently replaced the two other mj1200's with these a few weeks back and the difference is ridiculous! These guys are completely silent!
Just quit By Bryan on 3/7/2014Bryan wouldn't recommend this product to a friendThis unit was purchased with a BRS Reactor. After three months the pump just quit.
So quiet ! By Vince on 1/14/2014Vince would recommend this product to a friendSwapped out my AIO sump pump with this, I can sleep at night!!! This is better than the MJ by a mile!
Quiet! By Bill on 11/2/2013Bill would recommend this product to a friendWas previously using a maxi-jet 1200 to run my BRS reactor. After a few months of use it seemed to have lost a lot of power. I took BRS's advise this time and went with the Cobalt, so glad I did. I noticed more flow initially than the maxi jet had but the best part, it is soooo quiet! I'd never choose a maxi jet over a cobalt again!
Better than Marineland By dac on 10/17/2013dac would recommend this product to a friendExactly what RYAN said. I replaced 1200 for 1200, and the thing is silent. My Marineland also lost power over the past 5 months. This thing is legit
The old maxi-jet! By John on 6/28/2013John would recommend this product to a friendGreat, finally good powerheads to use!
Previously Asked Questions
by David on April 5, 2014, @4:52 PM
If you're using this pump as part of your ATO system, what is the size of the output? I'm getting the Hydor ATO system and this pump was recommended by you. I would like to get the correct size tubing before I get the pump and set up the system. Thanks.
Bulk Reef Supply Hi David,
The MJ1200 has an output that is actually the same size as 1/2" RO tubing, so conveniently you can actually use a 1/2" push connect union on the end to connect the pump to 1/2" ro tubing just like we do with our BRS reactors.
by Jacob on March 22, 2014, @5:29 AM
What is the output size on this pump?
Bulk Reef Supply Hi Jacob,
The output size of the pump is the same as 1/2" polyethylene tubing like those used with our reactors (which is a slightly different standard then 1/2" PVC). A 1/2" push connect union for example will snap right on.
by Patrick S. on April 14, 2014, @12:21 AM
As I need to ensure that space is available within my existing sump, what are the "footprint" dimensions of the MJ-1200 pump?
Bulk Reef Supply Hey Patrick,
Assuming the output is up and your not using any of the suction cups, brackets, etc the pump is about 2" wide and 3.5" across, though keep in mind with that later number you will want some extra room so the water can actually enter the volute so I would go with more like 2x4 at the least.
The Cobalt Aquatics MJ series of pumps is the same Italian-made MJ you have been using for the last 20 years. Reliability and low operating noise have been the staple of this pump series, a principle reason why aquarists around the world have been using them for decades. After the original MJ distributor moved operations to China, Cobalt Aquatics jumped on the opportunity to work with the Italian manufacturer to continue to provide a source for this high quality product line. Mostly used for wave makers, protein skimmers, calcium reactors, nano aquariums, under gravel filters and hydroponic applications.
- Fully rotational output
- Fully sealed intake for internal and external use
- Universal intake tube Adjustable hanger with cord guide and 6 Ft power cord
- Adjustable venturi with silencer
- Triple suction cup mount
- Large intake screen for use with sponge
Quick Compare - Cobalt Aquatics MJ Powerheads
|Model||Flow Rate||Maximum Head Pressure||Watts|
|Cobalt MJ400||106 GPH||29"||5|
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