Cary:
That's a heck of a front porch view- very nice, calming and inspiring! Can you tell me more about a de-gassing column, since I've never heard of that???
I had many tropical fish tanks, so I understand about NH2 and NH3 (ammonia) and biomedia for small fish tanks. What is a good low cost biomedia for a 1/3 acre pond? Why would I need to de-gas well water? This well water is heavy mineral water, lots of iron I know, but not sure what else?

Because it is pumped, I can lift it several more feet and then cascade into pots etc. What size pots would hanlde a 25-30 gpm flow?