Isn't the tubular thing the same type structure that CC are lookin' for to spawn? About 2 years ago, I came real close to buying a beautiful 2 Ac pond that was stocked with CC. The owner told me that he had dropped tile sections to the bottom to encourage spawning. As I read thru the forum, most of the print to this regard agrees, albeit a questionable level of positive results.
(edit)Ya know, I'm thinking about Bruce's Tile condo...the 4" tile is cheap as dirt. I could easily see building a a couple of these with that stuff, but would the smaller diameter be restrictive to promoting use? Bruce's model home appears to be something closer to 8" dia stock.
