Depended on your stocking, the reef octopus 1000 would be my suggestion. Great skimmer that breaks in quickly and has always pulled a good skim for me (I use the 110INT) Plus coralvue customer service is amazing, and part of a product (to me) is also the company backing it. https://www.bulkreefsupply.com/reef-octopus-bh1000-hang-on-the-back-protein-skimmer-2.html