1. Assuming your pool is algae free, raise your chlorine level to above 10, and keep it there, till you have more information and another plan. When CYA > 100 ppm, swimming with chlorine > 20 ppm is no problem. Use the 10ml sample to test chlorine, so you don't use up your R0871 drops.

2. Read the Best Guess page, linked in my blue signature block.

3. Tell me if you have any sort of heater or salt water chlorination system. Tell me if you are currently having any scale appear.

4. Tell me what kind of pool you have (vinyl, FG or concrete) and whether the ground is dry in your location. (S Calif, so I assume it is, but please confirm).

5. Do NOT use any algaecides or other such products.

6. Mix 1 cup of pool water with 1 cup of tap water. Test CYA levels in the mix. Multiply result x2 for actual pool CYA level.

7. Tell me what you've been using to chlorinate.

8. If you have NOT been using cal hypo, but have some idea where the calcium came from, please explain.

9. Do NOT worry about CC levels, even if they go up a bit.

10. Tell me what sort of filter you have.


Good luck!