As an Amazon Associate we earn from qualifying purchases. Buying through these links costs you nothing extra and helps keep the app free.
What one dose does
PARAMETER
1 ml / 100 L
Calcium
+0.0087 ppm
Alkalinity
+0.0012 dKH
To raise calcium by 20 ppm in 100 L: 2,297 ml.
How it’s used
Experienced users. Mix 6 g (~1 tsp) per US gal of purified water, let settle 1 h, decant clear liquid, and drip with a doser. Keep pH rise <=0.1 per hour and never above 8.5; dosing at night helps.
Cautions
• Caustic (calcium hydroxide); avoid skin/eye contact and inhalation.
• Never add powder directly; dose only decanted clear solution with a doser.
• pH must not exceed 8.5; keep salinity from dropping below 1.021.
Sources
MANUFACTURER ERROR SUSPECTED: Brightwell's '2.3 ppm Ca, 0.04 Sr, 0.06 Mg per ml of saturated solution per US gal' appears to be 10x too high (calcium hydroxide saturates near 1.5-1.7 g/L). Stored the derived 0.23 ppm. Sr/Mg (~0.004/0.0006 ppm per ml after the same correction) omitted as negligible. Dose unit is ml of decanted stock, not grams of powder.