Salifert Magnesium Test Kit (25–50 Tests) for Marine & Reef Aquariums

Maintaining correct magnesium levels is critical for a healthy and stable reef aquarium. The Salifert Magnesium Test Kit (25–50T) is designed for accurate measurement of magnesium in marine and reef waters, helping reef keepers maintain optimal calcium and alkalinity balance.

Magnesium occurs naturally in seawater at concentrations of around 1300–1400 mg/L and plays a vital role in coral growth, calcareous algae development, and photosynthesis. It also prevents unwanted chemical precipitation of calcium carbonate, ensuring calcium and alkalinity are used biologically—where corals need them most.

Low magnesium levels can cause rapid depletion of calcium, alkalinity instability, and loss of valuable trace elements. With Salifert’s high-precision test kit, reef aquarists can confidently monitor magnesium levels and take corrective action before problems arise.

At Reef freaks, we recommend regular magnesium testing as an essential part of any successful reef maintenance routine.

Key Features:

• Accurate magnesium measurement for marine & reef aquariums
• Measures natural seawater range (1300–1400 mg/L)
• Supports stable calcium & alkalinity levels
• Prevents unwanted calcium carbonate precipitation
• Essential for coral & coralline algae growth
• 25–50 tests per kit
• Easy-to-follow instructions with reliable results

The Salifert Magnesium Test 25–50T is an essential diagnostic tool for reef aquariums. By accurately measuring magnesium levels, it helps maintain proper calcium and alkalinity balance, prevents chemical instability, and promotes healthy coral and algae growth. Ideal for both beginner and advanced reef keepers, this test kit supports long-term reef success when used as part of a regular testing regimen.