I've just installed the Koralia 1 in my 4x2x2...very gentle flow despite the 1500L/hr rating. I'm definitely adding 1-2 more. I think if I put in the nano, the additional flow would get "lost" in the tank, so I'm glad I got the 1...in fact I'm thinking that perhaps I should have gotten 2 Koralia 2s instead.
So the larger Koralias are good for a larger planted tank blue33![]()
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