HOB Skimmer

I’ve never used that brand but I’ve not heard anything negative about them.

I would use both the skimmer and AC110. The AC110 gives you the additional filtration of the rock and will also give you a spot to add carbon, GFO, etc as needed. Plus, it adds more circulation.
 
Give it a try! I'm not familiar with the brand, but as long as it makes bubbles and you can adjust it to collect some gunk your tank will react positively.
I ran an AC110 refugium and a hang on back skimmer on a 20g nano tank for several years with good results.
 
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