This little skimmer by Aqua Medic has worked both in a sump and outside the sump, most recently on my frag tank. It's cleaned up and ready to go to a new home. It worked very well on my original 95G Wave Tank in the sump. It's rated at 250G, but I think in reality it's good for a tank up to 120G.
http://www.aquacave.com/turboflotor-multi-sl-hang-on-protein-brskimmer-by-aquamedic-483.html
$100
PM me any questions.
http://www.aquacave.com/turboflotor-multi-sl-hang-on-protein-brskimmer-by-aquamedic-483.html
$100
PM me any questions.