The API Calcium Test Kit helps you monitor calcium levels in your reef or saltwater aquarium. Calcium is one of the most important elements in a reef tank. Corals, clams, snails, crustaceans and coralline algae all use it to grow and stay healthy.

Over time, calcium levels drop as invertebrates use it up or as it reacts with excess phosphate. Regular testing helps you know when and how much to supplement. This kit measures calcium levels as low as 20 mg/L, helping you keep conditions stable for healthy coral growth.

Key Features

• Measures Calcium: Detects levels as low as 20 mg/L
• For Reef Aquariums: Ideal for tanks with corals and invertebrates
• Supports Coral Growth: Helps you keep calcium at the right level
• Easy to Use: Liquid test with clear instructions
• Complete Kit: Includes everything you need to start testing

What’s Included

• 2 test solutions
• 1 test tube
• Easy-to-read instructions

How to Use

1. Fill the clean test tube with aquarium water to the line shown in the instructions.
2. Add the test solutions as directed, counting drops and swirling between each one as instructed.
3. Record the number of drops needed for the colour change, and use the included instructions to work out your calcium level.

Please note: Rinse the test tube with clean water before and after each test for accurate results. Keep out of reach of children and avoid contact with the eyes and skin. Store in a cool, dry place.

Suitable For: Reef and marine aquariums with corals, clams and other invertebrates.