Cobalt MJ1200 Powerhead

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Cobalt MJ1200 Powerhead

SKU: 210504
50 Review(s)
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  • Don't buy if you need good flow By on 5/30/2017

    Has little to no flow with zero head pressure I wouldn't recommend for price it should be much better I've had cheap Chinese pumps better then this also should a barbed fitting to connect multiple sizes of hoses to it if I was brs I would not have chosen this as a brs recommends product and fills very cheap
  • Just was not for me! By on 5/1/2017

    Purchased two MJ1200. Both stop working exactly 1 day after my warranty.
    I have 2 other powerheads that I've had for years and was much cheaper.
    May work for someone else!
  • SHOCKING EXPERIENCE By on 1/28/2017

    I was cleaning this pump and plugged it in to run fresh water through it. The pump shocked me pretty good so I got a voltage tester and threw one probe in the bucket with the pump running and the other to ground. 48 volts was surging through the water.. The pump was only about 5 months old and I wonder how long it was energizing my reef tank. I did want to share this experience since the MJ's highly touted as being good. I have replaced this one with a Eheim 1048 that I've had for 15 years that was in my boneyard of retired equipment. Now that is a good pump!!
  • Awesome By on 1/16/2017

    I bought a used biocube 29 that someone had already done a mess of "retrofit" diy wtf... Luckily this return pump was the best and only part I kept. Mine is an older model, but it is still pumping away like a champ one year in, plus however long previous owner had it. Made me brand loyal!
  • Awesome Pump! By on 9/12/2016

    I dont know why everyone only sells the Marineland pump, this Cobalt pump is worth every penny. I've always gone with the Marineland as those are the only version sold by my local LFS, but anytime you try to restrict flow, for a reactor for example, they generate a ton of heat and noise, even just barely throttling them back. This Cobalt is silent, runs cool, and works great. I am going with these from now on. I cant speak for longevity as I havent had this pump for very long but I am extremely happy with it so far.
  • Failed after 3 weeks of use By on 4/7/2016

    Maybe I just got a bad one, Mine failed after less that 3 weeks of use. I contacted cobalt directly, they said I should soak the impeller in vinegar for an hour, I did that it still did not work. Soaked it for a full day. Still did not work. Called cobalt back and they said they would send a new impeller. That was almost four weeks ago, still no new impeller
  • Great pump! By on 3/7/2016

    Works exactly as described. Very pleased powerful AND silent. Highly recommend!
  • Great Product! By on 3/7/2016

    This pump is unbelievable! Super Quiet! small footprint considering mine sits in the tank.
  • Great pumps By on 12/16/2015

    These are tried and true workhorse pumps. I use them for multiple purposes and they are extremely dependable and quiet. The Cobalt brand is much quieter and the build quality is superior to the Marineland version.
  • Good Buy By on 12/13/2015

    Works great ....Perfect for my carbon/gfo reactor.