CloroxPro Anywhere Daily Disinfectant and Sanitizer, No-Rinse Food Contact Sanitizer, Refill, 128 Fluid Ounces

Thanks, but there is no well. All the Clorox in local stores I've found so far is for cleaning and seems to have other stuff added. I can buy from Amazon. Is "CloroxPro Anywhere Daily Disinfectant and Sanitizer, No-Rinse Food Contact Sanitizer" the right stuff (link)? Tank is on a concrete pad that would have to be demoed. Puerto Rico is largely volcanic rock, digging is difficult. The tank is ~5.5' tall and 5' diameter, that's a big hole. Even some kind of shade is a pain due to wind/hurricanes. Maybe some sort of foam wrap is doable.