Sulphuric acid in CYA

[dawndenise]

I heard that Wal-Mart had a much better price on CYA than Leslie's ($13 vs. $20) for 4#.

After getting the product home, however, I noticed that the WM brand (HTH) has 96% CYA and Leslie's has 99%. Of more concern to me however, is that the WM brand has a side listing that states ingredients as cyanuric acid, SULPHURIC acid and water. The side listing is for EPA numbers...the main ingredients listing makes no mention of sulphuric acid. Leslie's brand has no mention of sulphuric acid anywhere on the container.

Do I want to use this or should I return it? I realize it can't be a whole lot of sulphuric acid, but why would I want sulphur in my water?

Thanks for any advice...