The main ingredient in that product is Cal-Hypo, so it won't hurt the CYA level, but it will increase your CH. Since I spent 7 years at Luke and know that area quite well, you don't need anything else to make the water harder than it already is.
If you already opened it and can't try to take it back for a refund or store credit, then keep it in a dry location just in case you ever need it later. It should last for a while.
Maybe I will try and take it back.
I retested the CH, and I don’t think I’m doing it right. The sample keeps turning purple. Even when I add the 5 drops first then continue. I really don’t feel like running out and buying distilled water. So its between 100 and 200.
We'll help you through CH testing later. The Powder should be fine stored and may come-in handy at a later date. But for now you know regular bleach is the best method. Have a good evening, and we'll look for the results of your OCLT in the morning.
So the goal now is just to keep it at 5 right? Test my CYA weekly? And assuming it stays around 30-40 then I keep the FC steady at 5. This would be impossible without this forum!
Alright! Yes, a loss of 0.5 FC overnight is good. So just continue to check that FC each day for any unusual changes/drops. I'd keep it on the higher end of the recommended range based on a CYA of 40, so about 6-7. I know I'm splitting hairs, but just don't let it drop below 4-5 for a while, even though the minimum is 3. Before you hit the camping trail, go ahead and kick the FC up a little higher if you're going to be gone for more than 24 hrs. You can go up to 10 or so if you like with no problem at all. As for the CYA, no need to test weekly unless you just want to confirm one more time later for practice. Once you get the hang of it, once a month or so should be fine. Enjoy!
Sweet- only once a month, I like that! 
