There was a thin foam sheet that is in the shipping box with the tank. I kind of tore it because I almost threw it out.
The skimmer is not performing that great yet because of my low biology. I could have went with a smaller version but with my plans I decided to go larger. I am planning to have over 20 fish with a few of them being tangs and 2 trigger fish and also to carbon doser to keep nutrients in check. I won't see the performance I'm looking for until my bio load gets larger. It did pull some pretty dark skim mate but, I completed a water change, now it's tea colored. I'll have a better opinion after my next batch of fish get out of qt
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