Red Sea Foundation Dosing Calculator

Calculate Calcium, KH / Alkalinity, and Magnesium doses for your reef aquarium.

Dunia Anura

Red Sea Foundation Dosing Calculator

Calculate Calcium, KH / Alkalinity, and Magnesium doses for your reef aquarium.

For Red Sea Foundation Liquid

Red Sea Foundation A Calcium+

Contains: Calcium, Strontium & Barium. Calculation is controlled by measured Calcium.

View Product

Ensure salinity is correct before calculating a correction.

Actual Water VolumeUse an estimate of actual aquarium + sump water volume after rock, sand, equipment, and other displacement.

Current Calcium

ppm

Target Calcium

ppm

Enter volume, current value, and target to see the dose.

Foundation dosing order

When correcting multiple elements: Magnesium → wait ~10 min → Alkalinity → wait ~10 min → Calcium. Do not mix Foundation A, B, and C in the same dosing container.

How to Add

Dose into the sump when available.
If no sump, add slowly into an area of high flow.
Avoid direct contact of concentrated solution with corals or fish.
Retest the parameter after correction.

Do not mix Foundation A, B, and C in the same dosing container. Foundation supplements can react and precipitate if mixed.

Calculator Guidance

These calculations are estimates based on the Red Sea Foundation Liquid concentrations used in this calculator.

Actual needs depend on true water volume, test kit accuracy, salinity, organism consumption, water changes, and system conditions.

Always test before dosing and retest after significant corrections. Do not exceed recommended daily increases. Flow: TEST → CALCULATE → DOSE → RETEST.