Update three years of 247 use and still running like a champi bought this powerhead april 2015 and ran it in a 20 gallon goldfish tank on this diy filter with a 100 ml carbon bag under the media

Three months ago i moved it to my 55gal took out the carbon bag and put the aeration tube back on

The only problem was that the flow was not strong enough to generate aeration certainly not the cobalts fault since it was me that put so many hinders des in its way