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What one dose does
PARAMETER
1 g / 100 L
Calcium
+2.2712 ppm
Alkalinity
+0.0946 dKH
Strontium
+0.0447 ppm
To raise calcium by 20 ppm in 100 L: 8.8 g.
Maker’s daily maximum: 1.1 g per 100 L (1.1 g for 100 L).
How it’s used
Dissolve 2 g (~1/2 tsp) per 20 US gal in 8 fl oz fresh water; stir right before dosing; every other day; dose at night (may cloud). Advanced: 20 g per 8 fl oz stock, ml/day = Ca drop / 5.1 x US gal.
Cautions
• May temporarily cloud water.
Sources
Brightwell publishes potency per ml of a 20 g/8 fl oz stock; converted to per-gram. CONFLICT: per-gram Ca from stock (60) vs guaranteed analysis (95) - partially insoluble aragonite likely explains it. Mg (0.18 ppm/g) and K (0.035 ppm/g) omitted as negligible. Page lists liquid-style sizes (250ml/500ml/2L/20L) though product is a powder ('400 g treats 4,000 gal'); sizes unverified. maxDose derived from stock limit (10 ml per 20 gal = 0.85 g).