Nano

You should check the GPH on the koralia you buy, when I got mine for my rimless 8 gallon cube I notice that my LFS had two different models of the nano. One of them had A GPH of 280??? And the second newer model had double the GPH of the other!!! I went with the older version with less power because the tank is a Xenia farm and I didn't want a ton of flow. I ended up having to point the koralia at the surface of the water because it was still too strong.
 
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