Need small in sump skimmer ideas

[ElCamino]

its for a 20 gallon zero edge tank, the sump is super small have to fit a skimmer and the return pump in there. Im ok with mid to higher end, want a good one, its a clam tank with some lps thanks

 

[zsuman101]

tunze makes some small effective skimmers, i use them on my nano aio's