Quiet By Robert on 3/9/14
Robert would recommend this product to a friend
The maxi-jet double pack prefilter fits on it, its about as quiet as my heater haha, i sleep close to it and can never hear it
Serviceable, quiet powerhead By Jeff on 5/2/13
Jeff would recommend this product to a friend
I bought this powerhead for extra flow in my 18" cube coral quarantine tank. It has nearly silent operation and does its job well. I would encourage anyone looking for a small, inexpensive powerhead to give this product a try.
Nice pump By bruce on 4/13/13
bruce would recommend this product to a friend
The Mj400 is powering my ATO. I was very surprised how quiet the pump ran and would definitely recommend.
Great pump By Daniel on 8/4/12
Daniel would recommend this product to a friend
I will for now on only buy Cobalt pump for my pump needs. I cant even hear this thing running and its definitely running great product.