Hi sjdhr75
Where are you at with the care of your pool right now? Have you purchased a FAS-DPD test kit yet? It really is necessary to adequately shock your pool.
I would not worry about your CYA at this time as you have added plenty to help hold the chlorine while you shock. You need to shock your pool.
Have you read the article on shocking your pool? You can read it here,
Shock Your Pool.
Assuming a CYA level of 50, your shock level needs to be at FC - 20. You need to maintain that level until you meet three criteria.
1. CC is 0.5 or lower
2. An overnight FC loss test shows a loss of 1.0 or less
3. the Pool water is clear.
You need to run your filter for 24 hours a day until this process is done and it is best to use liquid chlorine for the shock process.
When you start to shock your pool, it is not necessary to test any level except for the FC/CC with the FAS-DPD test kit. When the shock process is complete, you can resume testing other values.
Also, your signature line should have your pool information within it so readers can help you more easily.
