OK. I'm finding that most of the cyanuric acid products say 98.5% cyanuric acid and 1.5% other ingredients. Is this pure enough? I've checked Walmart and Lowes. Our Lowes only has a product called Pool Mate and the local Walmart only has HTH and both products are called Chlorine Stabilizer. I'm sorry to be back and forth on all these details; but, my husband isn't into this stuff. He likes that I'm into it and he's willing to go buy everything. I just need to give him a specific product to pickup as I'm working

BTW Pool is full and I need to do tests in the AM.