Chlorine confusion

[CarlD]

Hi Greg! How did it turn out?
$6/gal liquid chlorine is the equivalent of $3/gal 6% bleach. In my area, pool stores sell 5 gal carboys of the stuff for about $17. Yes, you must make a deposit of $6/carboy, and you'll need a $4 spigot, but that's a one-time investment to get the equivalent of $1.70/gal bleach. When you need a new carboy you give them the empty instead of a deposit. The spigot lasts for years. I must have my 3 carboys 6 or 7 years now, exchanging them when needed.

Liquid Chlorine is usually nominally rated at 12%, basically double the strength of 6%. That just means half the amount has the same effect. Sometimes it tests higher, occasionally lower (especially if it's old). So...if it costs less than double what a gallon of 6% ("Ultra") bleach costs in your area it's a good buy. If it costs more, it is not. $6 is just too much.

Do check that best-guess table. If you cannot get the Taylor K-2006 or K-2006C test kit there are a few reasonably good alternatives (that also use FAS-DPD testing) that are the equivalent, plus some "Plan B" alternatives you can use if you cannot get the Taylor or alternative.

[GregP]

Thanks for the information. I still don't have the pool opened up yet. In PA lately one day it is 80 degrees and the next there is a hard frost. I want to get it up and running hopefully in the next couple of weeks. My pool store carries the liquid chlorine, but I do not know the strength or price. I gave up on the pucks and chlorinator, it is not worth the problems and hassle that I had with it.
In reading PoolDoc's reply, if the Dichlor and Trichlor is "pure", then is it free of CYA?
Thanks
Greg

[PoolDoc]

In reading PoolDoc's reply, if the Dichlor and Trichlor is "pure", then is it free of CYA?

No -- if it was, then it wouldn't be dichlor or trichlor. "Pure", in this context, just means, "not blended with other goop".