Is CYA basically only available at pool stores? Do Walmart or other discounters sell it? I never seem to see it at those stores, but I really don't know what to look for. What is it actually called at the store - I mean like what brands or product names. I will be needing some in the next few days, hopefully.
And, I am also assuming that for a new pool filled with well water there is zero CYA in the raw water. Is that true? So in the pool calculator i just type in the gallons and beginning balance of zero and I can then determine how much to dump in right away?