The info I've found on CCA treated lumber is not something that makes me think of good health. I don't know how long it takes to seep or what it does in water, but I know they don't use it on playgrounds anymore. If it isn't safe enough for kids, I don't want it in my water with my fish. Not to say it's going to leak for sure, but I don't want that risk potential.

Links on CCA Treated Wood:

http://www.epi.state.nc.us/epi/oii/cca.html
http://poisonwood.wasteage.com
http://www.epa.gov/oppad001/reregistration/cca


0.6 acre pond / 13' max depth / Bonham, TX