compared to the tunze nanostreem.. By Erik on 8/29/10
Erik would recommend this product to a friend
I have used both the koralia and the tunze powerheads. The Hydor koralia really has the best value because they are significantly cheaper and seem to do the job. I do think that the tunze nanostreams are more attractive, built better and easier to aim the flow. I have never had to call hydor before but the one time I called tunze with a warranty issue they solved my issue with a 2 minute phone call, I was really impressed. I would use the koralia again in any tank where i was trying to keep things cheap but always go back to the tunze on my show tanks.
5 stars By The mule on 8/29/10
The mule would recommend this product to a friend
I was using only my returns and some maxi jets for flow and the tank was doing "ok" . After adding four of these to my 90 there is a night and day difference in the tank. My small cyano problem literally disappeared overnight and I have never seen it again. All of the coral polyps are extended beyond what i thought was possible and the fish play in the flow all day long rather than just sitting there or moving slowly.
Poor Product By Brian on 8/21/10
Brian wouldn't recommend this product to a friend
It is noisy, and poorly / cheaply made. All plastic including the prop shaft which was not straight on the one I got. Pump would barley move any water, it spent more time stopping and starting and ratteling. You get what you pay for! I have 2 of the magnums also and have been happy with those. I was enticed by the adverstised low power consumption and higher output listed for the evolution models. Other net postings I have seen complain about the same issues.