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Hanna Instrument Hi-721 - IRON TESTER

Hanna Instrument Hi-721 - IRON TESTER
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Price: 65,99Euro [TaxInc]
Availability: Immediately Available

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Product:Hanna Instrument Hi-721 - IRON TESTER



esigned exclusively for saltwater aquariums, the Hanna Alkalinity Checker offers a quick, easy and highly accurate method of checking one of the most important water parameters for salt water aquaria.

Alkalinity helps to maintain a stable pH, a vital factor for most aquatic life. Corals also need an adequate level of alkalinity in order to support healthy growth: if levels are too low, corals cannot precipitate and form their skeletons; if levels fluctuate too much or too quickly, growth can become impaired.

The more precise and stable the levels, the better the results. With regular, precise monitoring, fluctuations in levels can be quickly corrected, giving your corals the best chance of success.

Recognised levels of alkalinity

Recognised levels of alkalinity Alkalinity of natural seawater is typically 125mg/L (ppm) CaCO3

Accepted alkalinity range in marine aquaria is 125 – 200mg/L (ppm) CaCO3

Some corals may benefit from higher levels of alkalinity but close monitoring is recommended

Accurate and easy to use

  • Accuracy ±5mg/L (ppm)
  • 1 mg/L (ppm) resolution
  • Designed to work with Hanna reagents
  • Large easy to read digits
  • Auto shut-off

Ideal for

  • Coral reef tanks
  • Salt water aquariums

Supplied with

The HI755 Checker for Alkalinity comes complete with:

  • 2 sample cuvettes
  • 1 black cuvette cap
  • Starter pack of 6 reagents for Alkalinity
  • 1 x 1.5V AAA battery
  • Full working instructions


Range 0 to 300 mg/L (ppm)
Resolution 1mg/L ( ppm)
Precision ±5% of reading ±5 mg/L (ppm) @ 25°C
Light Source LED @ 610 nm
Light Detector Silicon photocell
Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Battery Type (1) 1.5V AAA
Auto-off After 10 minutes of non-use
Dimensions 81.5 x 61 x 37.5 mm
Weight 64 g
Method Colorimetric method

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