Not good for anything above a 10g.. By Ian on 2/2/2013
Ian wouldn't recommend this product to a friend
I bought this for my 20g long tank, and it says it can handle up to around 50.. For one, they should really say that this is for SUMP only.. If you plan on adding this to your display (like a lot of us nano-reefers) then make sure your tank is rimless. If you have a rim, you wil never get this adjusted correctly.
The biggest complaint besides that would be it doesn't run long enough to top the tank off. When you have a 20g, it should top it off, but it will run for a bit, and then do it's auto shut off and the tank isn't topped and the sensor is still open. I'm very upset with this purchase, and will most likely be re-selling.