Reef Calcium and Alkalinity Dosing Calculator
Calculate dry pure-chemical mass to raise reef calcium or alkalinity.
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What this tool does
Calculate dry pure-chemical mass to raise reef calcium or alkalinity. No human or animal medication dosing. Actual water volume excludes rock/sand displacement; chemical hydration and purity matter.
How to use the Reef Calcium and Alkalinity Dosing Calculator
- Enter or select actual system water volume in gal.
- Enter or select product.
- Enter or select current calcium ppm or alkalinity dkh.
- Enter or select target calcium ppm or alkalinity dkh.
- Enter or select product purity (%).
- Read the calculated result; change any measurement to compare alternatives.
Formula
Ca grams=liters×delta(ppm)/1000/0.2726/(purity/100); NaHCO3 grams=liters×delta(dKH)×0.02999/(purity/100)
- volume
- Actual system water volume (gal, before metric conversion)
- product
- Product
- current
- Current calcium ppm or alkalinity dKH
- target
- Target calcium ppm or alkalinity dKH
- purity
- Product purity (%)
No human or animal medication dosing. Actual water volume excludes rock/sand displacement; chemical hydration and purity matter.
Worked example
For reef calcium and alkalinity dosing calculator, the following measurements illustrate the exact method: Actual system water volume: 75; Product: calcium; Current calcium ppm or alkalinity dKH: 380; Target calcium ppm or alkalinity dKH: 420; Product purity (%): 100.
Inputs
- Actual system water volume75 gal
- ProductPure calcium chloride dihydrate
- Current calcium ppm or alkalinity dKH380
- Target calcium ppm or alkalinity dKH420
- Product purity (%)100
Result
- Calculated dry product mass (grams)41.66
Results explained
- Calculated dry product mass (grams)
- Calculated dry product mass (grams) from the formula above. No human or animal medication dosing. Actual water volume excludes rock/sand displacement; chemical hydration and purity matter.
Frequently asked questions
Ca grams=liters×delta(ppm)/1000/0.2726/(purity/100); NaHCO3 grams=liters×delta(dKH)×0.02999/(purity/100)
No. Individual animals differ. Consult your veterinarian before changing feeding or treatment, and seek immediate veterinary care for poisoning concerns.
No human or animal medication dosing. Actual water volume excludes rock/sand displacement; chemical hydration and purity matter.
Use current measured weight, actual food or product label values, and the dates or water readings requested. Check units before entering any value.
Verify if the animal is ill, pregnant, growing unusually, or on a special diet. Aquarium chemistry changes should be measured gradually and checked against product instructions.