What he'd use completely depends on how his water tests.
A person can buy equipment anyplace nowadays. Agway, Tractor Supply, Lowes, whatever. Before you start buying stuff, you have to figure out what you need and how much of it, and that's based on the test.
It's really kind of odd that he has a well and needs anything at all. It's either shallow and getting runoff, or he's pooping in it, right?
