What is below the 60 inch mark? To properly seal the bottom of a pond, ideally you should have a 2' thick layer of clay, compacting it with a sheepsfoot roller in 6" lifts. That blue clay is good stuff.

www.hoosierpondpros.com


http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).