If anybody wants to make one like the DIY one, use blue barrels, not white. I've found that the white barrels get brittle over time, where I have not seen that with the blue barrels.

www.hoosierpondpros.com

[Linked Image from lh6.ggpht.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).