MChandler,
I'm just outside of Lynchburg, VA. I have a small spring feeding the pond we built. It averages around 20-40GPM depending on the time of year so I've been wondering if I'm going to accomplish much adding lime or I'll just have to do it on some frequency. I use the API aquarium test kits for carbonate hardness.
If you have a small stream from the spring, you could add ag lime there, and in the pond for some real gain/benefits.
