Just for an update on how well some are working. I placed two of the "blue man structures" under two night lights that overhang the pond. Within days BG started to show up at night and feed off of the bugs. Now there are more than 25BG feeding there every night. 25 is as high as I can count before they move. One night with the aid of my flashlight I observed close to 100 adult BG. The condo's are working well also. A friend brought his little girl over this afternoon, and she caught 10 BG from the condo in about 30 minutes. Thanks for the help and ideas guys, you're changing my pond already.