Mine did well on submerged structure last year. I have read some guys cut up those wax covered cardboard boxes and let pieces float around on the pond. They say it last quite a while and then just biodegrades. I might try a little of that this year.
Keep in mind, one male spawns with numerous females in his nest. After a few weeks, another male takes over the nest. Spawning continues pretty much spring thru fall.
Last edited by Bill D.; 03/06/15 05:22 PM.