Test results on new pool in Tucson

[FormerBromineUser]

Since you lost about 6ppm FC overnight, you have a chlorine demand that will take time, energy, and faith to get rid of.

I actually did calculate based on your post-times but that WAS a hassle and I might very well have been making incorrect assumptions. Lesson learned. However, if my assumptions were correct that you lost 6ppm from sundown to sunrise, we know that something is going on with your pool. Follow PoolDoc's recipe tonight and tomorrow morning and we will know for sure:

1. Raise your chlorine level to a tested 15 ppm or higher at 7 pm.
2. Add nothing else. Make sure your pump is on all night.
3. Test again after sunrise, but before 8 am.
4. Report BOTH results.

I would clarify that a "TESTED 15ppm..." means that you wait one hour after raising CL level in #1 above, and then perform FC and CC tests again. This is just to make sure of the exact effects of any additions. These would be the numbers we need for your morning post.

Remember to record your TIME