Hello Again-

I did not mention that we heat our pool to 85 degrees. I believe the temperature increases demand slightly.

1. Assume your 16,000 gallon pool needs twice as much, so 2 gallons per week of 5%. We swim every day, all day, as long as the sun is shining. 4 kids, their friends.
2. I am thrilled with 4 gallons per week, because almost never shock, I do not use anything else besides a sequestering agent and Ascorbic acid, my pool looks like glass, and a 5 gallon barrell at Namco is usually $8.99 plus deposit so my "miles per gallon" $$ is low. I wish it used less, but it will require cleaner children, which is a topic for another thread.