sms wrote, on Sat, 31 May 2014 07:46:48 -0700:

If you fill the pool in one day you don't need to be adding chlorine
or CYA or calcium as you go along.

Hi Steve,

You're my neighbor, so you know how potent the sun is out here!

I agree that had I filled the pool in a day, the 0 ppm of cyanuric acid
wouldn't have been as much a problem of the chlorine disappearing every
day.
https://c1.staticflickr.com/3/2908/1...5922732f_b.jpg

But, since I filled the pool over a period of three weeks, it was
eating a few gallons of 12% liquid chlorine a day, and it still had zero
ppm chlorine every time I tested a day thereafter.

That unexpected (expensive) problem was resolved in two days, with
a dozen pounds of cyanuric acid *powder*. Note this is the restricted
powder, which is the same chemical as the granules, only it's a bone
white *powder*.
https://c2.staticflickr.com/4/3681/1...f4ef8f92_b.jpg

The problem with the powder is that it instantly turns into cement
the moment it smells water, so, it can coat your lungs in a second!
Notice what happened here, as it caked into a brick with water:
https://c2.staticflickr.com/6/5159/1...2b59f88c_b.jpg

Do you have "city water" or just a well? It costs a lot to fill a pool
with "city water" but there are some advantages.

It costs a lot from a well also, as electricity is something like
45 cents a KWH (as you are aware0.

It's a well.

Where I grew up, in Florida, most houses had wells for sprinkler systems
but no one used that water for pool filling. And you couldn't really
drain your pool completely because it would pop out of the ground
http://realestate.aol.com/blog/2013/10/11/pedraza-family-pool-pops-up/.

I am always worried about those popping-out-of-the-ground scare stories,
but, it seems dry enough here that the bigger danger is the plaster
drying out:
https://c1.staticflickr.com/3/2898/1...19f60787_b.jpg