If each 3" tablet is 8 ounces, then in 22,000 gallons that's 2.5 ppm FC and 1.5 ppm CYA. If each tablet is 7 ounces, then it's 2.2 ppm FC and 1.3 ppm CYA. If each tablet is 6 ounces, then it's 1.9 ppm FC and 1.1 ppm CYA.

Richard