I wish I would have seen them first. I could have told you it is going to take a lot of weight to sink pallets. I make inverted Ts out of 2 pallets like this ( _l_ ). It takes about 100 lbs to sink one. One way to do it over time is to drive a post into the pond bottom . Put about 50 lbs of concrete tied to the bottom then tie the top to the post. After about 3 mths it will water log and you can cut it lose from the post and lower it to the bottom.

Last edited by ewest; 08/27/10 08:32 PM.