Just finished getting all my chemicals in balance in the pool and she just looks beautiful. I was going to add CH today and went to pool store to have the water tested since I don't have my kit yet and it tested 0 CH. He told me that was because the water was from the well and was going to the carbon filter, it would lack the calcium. Now according to him, I should add 1Lb in my 23,000 gallons pool, but with the pool calculator I have to add 64 Lbs. That sounds excessive, is that real?