Test kit ZOOLEK ZOO AQUATEST CA-MG – calcium and magnesium aquarium water test (MPN 68415)

ZOOLEK ZOO AQUATEST CA-MG is an aquarium water test kit designed to determine calcium (Ca) and magnesium (Mg) concentrations in aquarium water. The kit contains the reagents and instructions required to perform titration-based measurements that help aquarists evaluate two major contributors to total hardness and essential minerals for marine, reef and some freshwater systems. Accurate measurement of calcium and magnesium supports maintaining stable water chemistry for corals, invertebrates and organisms sensitive to mineral imbalance.

Advantages

The test kit offers a straightforward titration procedure with clear visual endpoints, enabling repeatable and comparable results. It is compact and supplied with calibrated reagents formulated for aquarium use, which reduces the need for additional laboratory equipment. Results allow informed adjustments to supplementation and water changes to maintain balanced Ca and Mg levels without guessing. The included instructions describe sample preparation and step-by-step measurement to ensure proper technique.

Suitable for

• Marine and reef aquaria where corals and calcifying invertebrates require stable calcium levels
• Home aquarists monitoring mineral balance in saltwater and mixed systems
• Hobbyists checking water hardness components before dosing supplements or performing water changes

Key specifications

• Measures calcium (Ca) concentration in aquarium water
• Measures magnesium (Mg) concentration in aquarium water
• Titration-based test method with visual endpoint
• Includes reagents and user instructions for on-site measurements
• Suitable for routine monitoring of mineral levels affecting total hardness

How to use

Collect a sample of aquarium water following the instructions provided with the kit, avoiding contamination from hands or equipment. Perform the titration steps in the order described, adding reagents dropwise and observing the colour change at the endpoint. Use the stated sample volumes and reagent volumes to calculate the concentrations of calcium and magnesium according to the kit’s calculation method. Rinse glassware between tests and dispose of used reagents according to local regulations.

Usage recommendations

Test regularly at intervals recommended for your aquarium type—more frequently after dosing supplements, water changes or when introducing new livestock. Record results to track trends over time and adjust dosing or maintenance routines to keep calcium and magnesium within target ranges appropriate for your corals, invertebrates or community.