Quick test for determining magnesium and calcium levels in marine aquariums. Simple and reliable monitoring of aquarium water parameters. Determines the ideal magnesium and calcium levels for robust and healthy growth of corals and calcifying red algae.

Easy to use: First perform the calcium test, then the magnesium test. Subtract the result of the calcium test from the result of the magnesium test - the result will give you the magnesium content.

Range: The number of measurements depends on the levels of calcium and magnesium.

For detailed information and tips on water analysis, visit the JBL website under Essentials/Aquarium or Pond.

Package contents: 1 test kit for Mg and 1 test kit for Ca, including 5 reagents, 2 plastic cuvettes, syringe, and dosing spoon. Reagent refills available separately.