I'm a new pool owner as of last summer. TFP is a great resource and I feel confident I will be able to maintain the pool on my own now. When we got the pool and tested we discovered the CYA was at 100 and the pool water was always cloudy and really high in calcium and other dissolvibles so we planned a drain. It was sure hard to keep the chlorine up through the late summer and early fall! I did an 80%+ drain last week and took the water in to the pool store (waiting for my TF-100 to arrive). They said my CYA is 100! How could that possibly be?
On a good note is that using PoolMath and instructions I have the PH down right to where I need it to be with no problem. I'm keeping the Chlorine close to where it should be measuring with dip sticks until I get my TF-100 and I can get more accurate to get my daily dose down to a science.