I just remembered having done that myself in the past, to ask them something else about my ETSS skimmer. Sorry I don't remember the URL for their website but you can find it via Google.
I would put a New Jet or a mag type pump with 2500-3000 l/h( 600-800 g/h) . I had one, it worked well for 120G reef...
Keep the air inlet klean from salt creep internaly...clean it with acid or vinegar every 6-10 months!