Hey,
Been having some problems with the oil slick and can't remember what fish you were using in there? I remember when I was making the Bob Fenner recipe, he used sea bass, and I found out...whoa, way waaay too oily. I tried halibut (hubby said - you are fricking putting halibut in the FISH FOOD...) and then I think I eliminated it because the fish aren't fish eaters..
Anyway, do you take off the oil before feeding or what can you suggest?