try a search to see who is using and email them directly, i hear some really good things about Tunze skimmers, know their other products work really well.
have not had experience with them. might even want to contact tunze and see what their skimmers are comparable to
I have a 3115 (good for up to about 100 gallons) which I have been using for the past seven years. It is an excellent venturi design. The only drawback is cleaning the body of the skimmer is a little difficult, but all in all a great piece of equipment for the price (about $215 online).
