DIY Soda Ash (Randy Recipe 1) Alkalinity Dosing Calculator

DIY Soda Ash (Randy Recipe 1) raises alkalinity by 0.053 dKH per mL per 100 L of tank water (manufacturer data: source). Enter your tank volume, current and target alkalinity below for an exact dose, split automatically if it exceeds the safe daily limit.

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Worked example

A 75 gallon tank (284 L) raising alkalinity by 1.0 dKH needs (1.0 / 0.053) x (284 / 100) = 53.6 mL of DIY Soda Ash (Randy Recipe 1).

Safe dosing rules

• Never raise alkalinity more than 1.4 dKH per day.
• Test again before each additional day of a split correction.
• Dose into high flow, away from coral tissue and intakes.