Hydor Koralia

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The American Korallia 2's and 3's are currently under recall. I don't think that's in issue in Europe though.

They are excellent water movers but they are rather large when in smaller tanks.
 
My #4 has ALOT of movement in my 40 breeder. Almost too much to my surprise.


And I like think alot of flow is important.
 
I have two K 1's. The are pretty small, about 1/2 the size of a pop can. The are very quite and easy to use as well. I have one on each end of the tank, mounted to the side, and have plenty of flow. If pointed down, they will definitely stir things up! So far, I love them, especially their 360 degree rotation!

Kris
 
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