Salifert Calcium Ca profi test

Calcium is a major element used by stony corals, giant clams, calcareous algae and other calcifying organisms. The Salifert test allows calcium consumption and supplementation to be monitored without an electronic meter.

A measured seawater sample is treated with the supplied indicator reagents. Titration reagent is then added until the sample changes from pink to a stable blue endpoint. The remaining reagent in the syringe is converted into a calcium concentration using the included table.

Key features

• Calcium test for marine aquariums
• Suitable for reef aquariums
• Measurement range approximately 0–500 mg/l
• Standard resolution approximately 10 mg/l
• Clear pink-to-blue endpoint
• Titration-based procedure
• Suitable for SPS, LPS and mixed reefs
• Useful for monitoring calcium supplementation
• Suitable for Balling systems and calcium reactors
• Suitable for checking newly mixed saltwater
• Standard and reagent-saving procedures
• Approximately 50–100 tests
• No electronic meter or batteries required
• Reagents and measuring equipment included

Technical information

• Product: Salifert Calcium Ca Profi Test
• Test type: colour-change titration test
• Parameter: calcium Ca
• Units: mg/l or ppm
• Approximate range: 0–500 mg/l
• Standard resolution: approximately 10 mg/l
• Sample volume: generally 2 or 3 ml, depending on kit version
• Number of tests: approximately 50–100
• Primary water type: marine water
• Electronic meter required: no
• Standard calculation: (1 − syringe reading) × 500

Directions

Several versions of the Salifert calcium test have been produced. Always follow the instructions supplied with the individual package.

For the common 2 ml version:

1. Add 2 ml of aquarium water to the test vial.
2. Add one level scoop of Ca-1.
3. Attach the plastic tip to the 1 ml titration syringe.
4. Draw titration reagent to the 1.00 ml mark.
5. Do not remove the normal air space inside the syringe tip.
6. Add approximately 0.6 ml of reagent and swirl for five seconds.
7. Continue adding reagent drop by drop.
8. Swirl for one or two seconds after each drop.
9. Stop when the sample changes from pink through purple to a stable blue.
10. Hold the syringe with the tip upward.
11. Read the remaining reagent.
12. Obtain the result from the supplied table or calculate:

Calcium mg/l = (1 − syringe reading) × 500