octopus NW150 question

[adnantz]

Does anyone know the best depth for this skimmer. My sump is 15" and I need to raise it. Thanks

[carlos_fb]

Everybody says 9" is the ideal.

[salth2owannabe]

I've got the recirc 150 model. I have the outlet just below the sump water level and it has been working great.