On Tuesday, June 24, 2014 7:52:50 PM UTC-4, DannyD. wrote:
trader_4 wrote, on Tue, 24 Jun 2014 16:02:51 -0700:
Wow, like 12.5 vs 11.6 really changes it materially.
Actually, I thought the liq pool chlorine was typically 12%.
I'm sorry if the implication was that it changed the results
by a lot. It doesn't, I agree. I was just being precise, but,
as we all know, the *age* of the liquid chlorine and exposure
to the elements can make a big difference in the levels.
So, your numbers are as good as mine, I agree. I never meant
to intimate otherwise.
And after all that, the liquid chlorine is still 40% more
expensive than trichlor.
This is a good point.
The liquid chlorine, I admit, is a pain.
Plus, it raises the pH (which is a different pain).
And it's a long drive for me to get the HASA stuff, which I
use a lot of:
But, I also use the trichlor! 
https://c1.staticflickr.com/3/2908/1...5922732f_b.jpg
And with trichlor, you bring home one 40 lb pail that lasts a season.
I use a few hundred pounds in some seasons, so the added CYA
is a problem. How much of a problem the CYA becomes is based
more on the leaks I repair (right now I have most repaired).
You grab 6 tablets, put them in the floating duck once a week.
I have four floaters, plus I use liquid chlorine, so, it's not
as inexpensive as you intimate, but I also have a huge pool.
https://c2.staticflickr.com/4/3678/1...18e5582b_b.jpg
Four floaters? Hundreds of pounds a season? Your season is longer,
but something isn't right here. 48,000 gallon pool
here, just one floater. One 40 pound pail of Trichlor lasts from
mid-May to early Sept, about 4 months.
Less expensive and no shlepping 36 gallons of liq chlorine in
jugs around in the car and then putting it in every couple of days.
I use both the trichlor pucks and the liquid chlorine:
https://c1.staticflickr.com/3/2908/1...5922732f_b.jpg
Both have their problems.
a) The trichlor adds CYA, which, after a while, is a bad thing
(as you always need to keep FC above the CYA levels).
b) The liquid chlorine is difficult to handle as I buy 16 gallons
at a time, and it's a royal pain to use.
The pool is pretty deep, as pools go:
https://c2.staticflickr.com/4/3750/1...bd17ae83_b.jpg
How many gallons?