Bob,
I'm thinking the water will be coming from the same aquifer as my house well. Although never having it formally analyzed, through the use of it over the years I can tell it has lots of iron and sulfur in it. And in with time the water will leave lime deposits on household plumbing fixtures. What should I look for if I have it analyzed?
Like Bob Lusk says you should have the water analyized to see what you are dealing with. There is a hatchery in Ohio (Remlingers) whose sulfides are so high in the well water the hatchery area smells like a sewage treatment pond. Really nasty smelling. The gas is blown off via aeration and doesn't hurt the fish but it sure stinks!
However, I've used a well essentially for years to top off my .62 acre pond (well water was pumped into a 1/10th acre trout pond and overflowed into the .62 acre pond.) With a pond your size I doubt the iron or sulfides would be a problem as long as they are not too high. < 3 ppm iron. < 200 ppm sulfides.
My 1/10th acre trout pond stays discolored from well water and iron coming in at ~ 2.5 ppm. It stresses the trout when I first crank up the well for the year but they adapt. I a 1/2 acre trout pond I doubt it would even discolor the water as it would settle before it could.
