Acreage Water

[Beverly]

Was talking to friends the other day who want to build a new house on a small acreage. The guy was interested in setting up a marine aquarium, but really doesn't know the first thing about the hobby judging by his statement about how all my corals are still alive

Anyway, don't most acreages have well water which isn't suitable for SW use even with an RO/DI unit unless the filters are changed frequently? Would like to give this guy as much information on water basics before he gets too far into the project. TIA.