Take the guesswork out of reef aquarium testing with the Hanna Instruments Marine Coral Care Kit. This complete testing bundle includes three digital Checker HC colorimeters for monitoring alkalinity, calcium and magnesium—the essential foundation elements required for coral growth, calcification and long-term reef stability.

Unlike traditional test kits that require you to interpret subtle color changes, Hanna Checkers provide clear numerical results on an easy-to-read digital display. Each Checker is dedicated to one parameter and includes the necessary starter reagents, testing accessories and battery, allowing you to begin testing right out of the box.

WHAT’S INCLUDED

• HI772 Marine Alkalinity Checker HC with protective case
• HI772 alkalinity starter reagents for 25 tests
• HI758 Marine Calcium Checker HC with protective case
• HI758 calcium starter reagents for 25 tests
• HI783 Marine Magnesium Checker HC with protective case
• HI783 magnesium starter reagents for 25 tests
• Six sample cuvettes with caps
• One minipipette with tip
• One plastic pipette
• One 5ml syringe with black markings and tip
• One 5ml syringe with blue markings and tip
• Two 1ml syringes with tips
• Three AAA batteries
• Instruction manuals
• HI783 Magnesium Checker quick reference guide

THREE ESSENTIAL REEF PARAMETERS

ALKALINITY

Alkalinity helps maintain stable pH and supplies the carbonate needed for coral skeleton development. The HI772 displays results directly in degrees of carbonate hardness, eliminating manual conversions.

Measurement range: 0.0 to 20.0 dKH
Resolution: 0.1 dKH
Accuracy at 77°F: ±0.3 dKH ±5% of reading

CALCIUM

Calcium is essential for the formation and maintenance of coral skeletons, coralline algae and other calcifying organisms. The HI758 provides direct digital calcium readings for saltwater aquariums.

Measurement range: 200 to 600 ppm
Resolution: 1 ppm
Accuracy at 77°F: ±6 ppm ±5% of reading

MAGNESIUM

Magnesium helps stabilize the relationship between calcium and alkalinity while supporting coral coloration, polyp extension and healthy reef chemistry. The HI783 measures magnesium throughout the range commonly maintained in marine aquariums.

Measurement range: 1000 to 1800 ppm
Resolution: 5 ppm
Accuracy at 77°F: ±5% of reading

KEY FEATURES

• Tests alkalinity, calcium and magnesium
• Clear digital results eliminate color chart interpretation
• Three dedicated handheld Checker HC colorimeters
• Compact, lightweight and portable
• Simple one-button operation
• Designed specifically for saltwater aquariums
• Starter reagents for 25 tests per parameter
• Protective cases included for all three Checkers
• Automatic shutoff conserves battery life
• Batteries and testing accessories included
• Excellent for mixed reefs, SPS systems and LPS aquariums
• Backed by Hanna Instruments’ one-year limited warranty

WHY TEST ALL THREE?

Calcium, alkalinity and magnesium work together to support stable reef aquarium chemistry. Measuring all three allows reef keepers to identify imbalances, adjust supplementation and maintain the consistent conditions required for healthy coral growth.

The Marine Coral Care Kit combines three of Hanna’s most useful reef testing instruments into one convenient package, making it an excellent choice for both new reef keepers and experienced hobbyists.

IMPORTANT TESTING TIPS

Always use clean, dry cuvettes and wipe the outside completely before inserting them into a Checker. Fingerprints, water droplets, debris and air bubbles may affect testing accuracy.

Handle cuvettes by the cap whenever possible. Follow the included instructions carefully and measure all liquids precisely.

The HI758 Calcium Checker requires pure vapor-distilled or deionized water during the testing process. Home-produced RODI water may contain enough residual calcium to affect results.

Prepared samples should be between 72°F and 82°F when tested.

PRODUCT DETAILS

Brand: Hanna Instruments
Product: Marine Coral Care Kit
Model: HICORAL
Aquarium type: Saltwater and reef aquariums
Parameters tested: Alkalinity, calcium and magnesium
Display type: Digital LCD
Battery type: AAA
Warranty: One-year limited manufacturer warranty

SHIPPING INFORMATION

This product qualifies for FREE Standard Shipping.

Orders are generally processed within 1 to 3 business days. Standard delivery typically takes approximately 3 to 7 business days after processing.

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