On 10 Oct 2004 17:03:21 -0700, (Rob) wrote:

I just installed a copper gate valve and remembered I'd read here that
copper is a no-no in ponds because it can kill the fish.

What's the opinion he will one short length of copper (actually,
it's brass, that has copper in it) cause problems in my 400 gallon
pond? I wanted a PVC valve, but it wasn't available at the time of my
purchase...
Brass is better? Copper, zinc, tin, lead?
What concentration matters and what concentration will you get,
especially at a pH of 6-8? The Local Home Depot has a small pond with
so many pennies in it the water is blue. There's a half dozen fish
thriving in there. Hard to know when it becomes an issue.
Weird, huh?
--
Crashj