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Dosing
The maker doses this by schedule rather than by a fixed potency, so the calculator cannot use it. Follow the directions below.
How it’s used
Powder. g = desired S rise (mg/L) / 2.25 x litres / 100; a level scoop (~22.5 g) adds ~50 mg/L S per 100 L. Do not raise more than 100 mg/L per day (44.5 g/100 L).
Cautions
• Do not exceed the stated maximum daily rise; split larger corrections over several days
• Dissolve fully in RO water before adding
Sources
ATI ICP Elements (relaunched line): single-element solutions for correcting ICP-measured deficits or daily top-up; bottle states the total element content. Potency IS published (1 g per 100 L raises S by 2.25 mg/L; tin 112,500 mg S = 225 mg/g x 500 g OK) but 'S' is not in the schema param list, so effects is left empty. Inference only (not stated by ATI): 225 mg S/g matches anhydrous Na2SO4 (32.06/142.04 = 22.6% S). ATI says Ca/KH systems without sulfate balancing are the usual cause of low S.