DSR calculator

Choose what you want to adjust. You’ll answer a few short questions and get a dosing suggestion based on these rules (always verify against your product label).

• Calcium (Ca) Target: 420–460 ppm · max +20 ppm/day · 0.3668 g / 100 L per 1 ppm
• Alkalinity (KH) Target: 7–9 dKH · max +1 dKH/day · 3 g / 100 L per 1 dKH
• Magnesium (Mg) Target: 1300–1400 ppm · max +50 ppm/day · 0.836 g / 100 L per 1 ppm
• Potassium (K) Target: 380–420 ppm · max +20 ppm/day · 0.667 ml / 100 L per 1 ppm
• Strontium (Sr) Target: 3–10 ppm · max +3 ppm/day · 3.04 ml / 100 L per 1 ppm
• Boron (B) Target: 3.5–4.4 ppm · max +2 ppm/day · 12.68 ml / 100 L per 1 ppm
• Iodide (I) Target: 0.06 ppm · max +0.03 ppm/day · 0.26 ml / 100 L per 0.01 ppm
• Manganese (Mn) Target: 0.4 ppb · max +1 ppb/day · 0.1 ml / 100 L per 0.1 ppb
• Phosphate (PO₄) Target: 0.04–0.08 ppm · max +0.04 ppm/day · 0.1 ml / 100 L per 0.1 ppm
• Nitrate (NO₃) Target: 1–3 ppm · max +2 ppm/day · 0.8 ml / 100 L per 1 ppm
• Iron (Fe) Peak target (your choice) · no fixed daily cap · 0.4975 ml / 100 L per 0.01 ppm
• Magnesium sulfate (MgSO₄) Mg + sulfate balance · Mg max +50 ppm/day · MgSO₄ vs standard Mg ×1.21