Hi. My pool is vinyl. When I got home tonight I did a water sample with the drops (just a small testing unit for cl and ph. The water color was brighter yellow than the 5 on the side for chlorine and the pH was 7.2. So, chlorine stayed in there today. I checked the powdered shock and it is calcium hypo so I will return that tomorrow. I am going to run to the store and get some more bleach for tonight. Luckily, I live in Washington state and actually its raining right now!

I'll also take in a water sample to the pool supply store but I won't buy a thing (unless they have the water sample kit I want!).

Will report my chemical results tomorrow.

Thanks to everyone,
Kathy