Hi, fellow West Virginian and welcome to the Pool Forum!

In addition to the info that Ben gave you, I want to give you a little more details about how to adjust your pH if needed. If it falls below 7.2, you'll want to use a little 20 Mule Team Borax (laundry aisle at Walmart) to raise it. If it goes above 7.8ppm, you'll want to use some muriatic acid to lower it but please read the link in Ben's signature above about using muriatic acid safely.