Jimito,
Look in Calfo's BOCP for the schematics on the Nilsen PS. This is what I am using in my GH on 300gal systems & they will pull a 5 gal bucket of skimate in 2 weeks if I crank em up. Use a Corolife Super luft air pump per 2 skimmers & yer set. I thimk my cost per skimmer was like $80.00 a unit including air pump.
Redox,
Looking good as ever my brother!! Have the Bluefins showed up yet down there?
Joshua