One serious question and some venting here.
Last week I went in to the national chain pool store to pick up some liquid Chlorine. The store manager tried to sell me Trichlor or something.
"A four pound box is much easier to handle than 30 pounds of jugs!"
"I already have too much Calcium."
"Oh, well, then, this other stuff doesn't have Calcium."
"It has cyanuric acid. I have too much of that, too."
"Well, when one gets too high, switch to the other. And when they both get too high, it's time to change water."
"But we're in drought conditions. Can't do it now."
"But the liquid stuff leaves all kinds of salts and dissolved solids!"
Today I was off. So I enjoyed my morning coffee and cigarettes testing the pool water. I added some acid and left the filter running. Plan to add more Chlorine this evening.
Late this afternoon, the pool service showed up. Not the owner, but his daughter. After our exchange, I am so looking forward to firing them in a couple weeks, once we're back from Europe. But I digress.
She said she tested the water and said it looks good. I imagine it would. My TF-100 vs her bottle of test strips. I told her I added some acid this morning. She said that must be why it was on the low end - she didn't need to add hardly any acid. (It was 7.4) Then she said, "The Chlorine looks good." Well, it isn't. It was at 12.0 at 7 AM, should be kept above 11 with the CYA level they left me with. And it was 3 PM when she tested. I'm sure it is off the scale of her test strip. Anyway, I mentioned that we'll be gone soon, and I'd like to leave some Chlorine out for her to add when she comes.
"Well, it's about time to put the floater back in."
"I took it out and have been adding liquid Chlorine." (I called and told her dad that months ago, I guess he never passed it along.)
"Liquid Chlorine leaves salts."
"The floater leaves too much cyanuric acid. I was up above 220 before I started pumping it out and let the rain dilute it."
"But the floater Chlorine is stabilized."
I didn't bother to tell her I don't want my Chlorine totally stable. I want it to be active! If I want it totally stable, I'd buy single pucks and leave them in the airtight wrapper!
Okay, vent over, back to the serious question to which I alluded earlier.
What are these salts in Sodium Hypochlorite, and why are they so evil?