If you have hard well water and your water report shows that your Calcium Hardness (TH) is above range, you really can't dilute it with your existing well water to reduce the total hardness. Instead, you will need to use a Flocculant that will bind to the calcium particles, causing them to clump together and sink to the bottom of the pool. Once it has all settled to the bottom, vacuum it out using your pool's waste setting. Please consult your products instructions for dosing information.
Note: Flocculant will only affect calcium that has not yet dissolved into the water.