Calculator / MGSO4

MGSO4

At most 50 ppm Mg rise per day. Sulfate: total MgSO₄ to set aside = (volume L / 1000) × ΔSO₄ × (246.482 / 32.06) g.

Set aside one batch of MgSO₄ for your sulfate correction (ICP-based formula), then use the daily table for Mg: each dose is pure-Mg math ×1.21 in grams from that stock until it is used up.

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In a reef aquarium

Magnesium sulfate supplies both magnesium and sulfate. In DSR you use it to move Mg toward target while sulfate rises gradually — useful when ICP sulfate is low versus your goal. You weigh one total batch for the sulfate correction and take only safe daily Mg portions from it so Mg does not spike in one go.

Quick tips

  • Use the same unit for reading and target (e.g. both ppm, both dKH for KH, or both ppt for salinity).
  • Volume = effective system water in liters (rough estimate is OK, but the cleaner the better).
  • This only plans increases. If you are already too high, the tool will not offer a “raise” dose: use water changes, media, or advice from your coach — not more of the same product upward.

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