Well so far i think i've spent about $200.00, maybe a little more. thats not including the pump, or the U.V. sterilizer. and i found that plexiglass pretty cheap for $148.00. i still have to buy a few misc. things. but when i am finished, i'll tally it all up for everyone. The $200.00 + was spent on 2X4's, 4X4's, 2 sheets of 3/4" plywood, some PVC, screws, wood glue, some wood stain, and the pond liner. then i spent $280.00 on the 1800 GPH pump, U.V. sterilizer, a 2" bulkhead, and some other stuff. Any ways thanks for the feed back. and again, what have people used to seal plexi to pond liner???