Yesterday I added both CL and acid to my pool.
This is what I posted yesterday on another thread regarding my readings prior to adding anything:
These are my readings this morning:
CH 375 (Note - This is slightly elevated from where we have been because we've tap water 3 times over the last 2 months due to evaporation. We've had windy weather with low humidity.
H2O 62 degrees
This is what I added to my approx. 22,000 gallon pool yesterday:
36 ounces of hydrochloric acid and the pH moved from about 8.0 to about 7.4-7.5
60 ounces of 10% chlorine and the chlorine moved from 5.5 to 10
My desire was to increase the FC from 5.5 to 7.5 so I added about 60 oz of 10% chlorine from Home Depot. I used the chart that came in my TF-100 kit to decide how much CL to add (56 oz) and I just went to the Pool Math Calculator and it also says 56 oz.
How in the heck did I end up with a FC level of 10.0? I purchased a case (4 gallons) of the 10% CL from Home Depot about a month ago. Yesterday, I finished the first gallon and started on the second gallon. If anything, I thought CL lost it's potency over time!