Funny story, I was at HD today getting bleach (only 13 days old...score!), and a lady was next to me pondering the last two bags of pool salt. They were both ripped open and spilling their contents. She walked away, I'm assuming to ask a sales person if there was more pool salt, apparently there wasn't and she came back to tape those two bags closed.You can use any plain water softener or pool salt in your pool.
I suspect the salinity of your water is all ready pushing 1000 ppm.
To add 1000 ppm salinity to your pool you need to add 140 lbs of salt.
I was fortunate that I found TFP while still in escrow of our house. I've went into Leslie's exactly twice.LOL ManiacalMama.....yeah, you can lead a horse to water and all that...... we hear that reaction a lot. Like when folks are trying to explain to pool store folks that they use <insert gasp!> "bleach" in their pools! <'nother gasp!> Can you *imagine*!?!? You can almost see their heads wanna 'splode!
Interesting, maybe just the bottom of the pile. The yellow looks way more processed, so maybe that is the better route in a hot tub settingWe've heard repeatedly of problems with Clorox salt containing iron, but that's a first I can recall any problems from that brand.