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https://www.swelluk.com:443/hanna-calcium-marine-pocket-checker/ 
Hanna Calcium Marine Pocket Checker
Ensure your marine life & aquariums are in great condition with a helping hand from a Hanna Checker. The Hanna Checker bridges the gap between simple chemical test kits and professional instrumentation. Hanna Checkers are small, handheld photometers that provide higher result accuracy than typical chemical test kits.
Product Information
Ideal for salt water aquariums and coral reef tanks. Designed to measure calcium in reef tanks, the Hanna Calcium Checker is perfect for corals and marine life. The checker is supplied with reagents for 25 tests.
The Hanna Pocket Checkers offer top quality technology to deliver high precision results. The Calcium Checker is a simple, accurate and cost effective way to measure marine calcium in water.
Key Features:
- For calcium ranging from 200 to 600 ppm
- Accurate results every time
- Large LCD display
- Testing is quick and easy
- High precision results - more accurate than chemical test kits
- Auto shut-off feature means the Checker cannot be left on by mistake
- Fully portable, fitting easily into both palm and pocket
Box Content:
- 2 sample cuvettes
- Cuvette cap
- Starter pack of reagents x 25 (re-ordering information: HI-758-26)
- 1 x 1.5 AAA battery
- Instructions