Mark,
Glad to hear our skimmers are doing the job for you.
The skimmer I would recommend for you is the SNWB110. It is a recirculating skimmer that can handle up to 110 gallons of water. Since you are using this skimmer on a frag tank, there will be very little bio-load so this skimmer would fit your needs perfectly.
http://www.coralvue.com/reef-octopus-dnwb110-classic-recirculating-protein-skimmer
Best,
Carlos Chacon
CoralVue