Today pH testing is pretty simple. Just get a kit from the store (swimming pool section). I don't know the chemicals involved, but they are extremely inexpensive, so probably easy to do once you know what you're doing. To adjust up, you add alkaline (base). To adjust down you add acid. There are several common products that contain these. Today, I just buy acid and base. I hardly use the base product, only when I screw up by adding too much acid as our water is very alkaline.
Offered by John.