Perfect for testing saltwater aquariums, reef tanks, and other marine and aquaculture applications.
Easily monitor calcium, alkalinity, and magnesium to create a healthy environment that fosters strong coral growth and development. This kit comes complete with everything you need. Watch your bold, vibrant corals thrive. Stop guessing with color charts. Get fast, accurate digital readouts in the palm of your hand with these Checkers®HC.
Begin testing aquariums instantly to support beautiful, colorful corals
Calcium, alkalinity, and magnesium play a significant role in promoting coral growth, and proper management of these parameters is critical. Reef tank owners must control calcium levels to promote stable coral tissue and skeletal structures, alkalinity must be kept in check to ensure stable coral calcification and growth, and lastly, magnesium must be maintained to foster good polyp extension and coral coloration. Be ready for regular aquarium water checks and test confidently with our Marine Coral Care kit.
Marine Calcium Checker (HI758) supplied with protective case |
Marine Calcium reagent starter kit for 25 tests |
Marine Alkalinity Checker (HI772) supplied with protective case |
Marine Alkalinity reagent starter kit for 25 tests |
Marine Magnesium Checker (HI783) supplied with protective case |
Marine Magnesium reagent starter kit for 25 tests |
Sample cuvette and cap (6 pcs.) |
Minipipette with tip (1 pc.) |
Plastic pipette (1 pc.) |
5 mL syringe with black printing and tip (1 pc.) |
5 mL syringe with blue printing and tip (1 pc.) |
1 mL syringe with tip (2 pcs.) |
1.5V AAA Alkaline battery (3 pcs.) |
Instruction manuals |
Marine Magnesium Checker (HI783) Quick-reference guide |
Specification | Detail |
---|---|
Calcium Range | 200 to 600 ppm (as Ca2+) |
Calcium Resolution | 1 ppm |
Calcium Accuracy @ 25°C (77°F) | ±6 ppm ±5% of reading |
Alkalinity Range | 0.0 to 20.0 dKH |
Alkalinity Resolution | 0.1 dKH |
Alkalinity Accuracy @ 25°C (77°F) | ±0.3 dKH ±5% of reading |
Magnesium Range | 1000 to 1800 ppm Magnesium |
Magnesium Resolution | 5 ppm |
Magnesium Accuracy @ 25°C (77°F) | ±5% of reading |
Light Source | Light Emitting Diode @ 610 nm |
Light Detector | Silicon photocell |
Calcium Method | Adaptation of the Zincon Method |
Alkalinity Method | Colorimetric Method. The reaction causes a distinctive range of colors from yellow to greenish blue to develop. |
Magnesium Method | Adaptation of the colorimetric EDTA method using calmagite indicator. The reaction between magnesium and the reagents causes a blue to violet tint in the sample. |
Battery Type | 1.5V AAA Alkaline |
Calcium Auto Shut-Off | After 10 minutes of non-use and 2 minutes after reading |
Alkalinity Auto Shut-Off | After 10 minutes of non-use |
Magnesium Auto Shut-Off | After 10 minutes of non-use |
Calcium Environment | 0 to 50 °C (32 to 122 °F); max. 95% RH non-condensing |
Alkalinity Environment | 0 to 50 °C (32 to 122 °F); max. 95% RH non-condensing |
Magnesium Environment | 0 to 50 °C (32 to 122 °F); max. 95% non-condensing Prepared sample cuvette (sample plus reagents) must be 22 to 28 °C (72 to 82 °F) *Warm or cool prepared cuvettes if needed. |
Dimensions | 86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5") |
Weight | 64 g (2.3 oz) |
Magnesium Interferences | Calcium below 300 ppm and above 500 ppm |
Reagent Sets | HI758-26 (25 tests for Calcium) / HI772-26 (25 tests for Alkalinity) / HI783-25 (25 tests for Magnesium) |
Calibration Check | HI758-11 for Calcium / HI772-11 for Alkalinity / HI783-11 for Magnesium |
Warranty | 1 year |
For our Marine Calcium Checker (HI758):
For our Marine Magnesium Checker (HI783):