The details:
Measuring range: approx. 300 ? 498 mg / l
Measuring range: Mg 820 ? 1800 mg / l
Resolution (accuracy): approx. 4 mg / l
Resolution (accuracy): Mg 20 mg / l
for determining the calcium and magnesium concentration in saltwater aquariums
sufficient for approx. 50 application
Refill Kits are available to save you money & reduce packaging waste.