Hanna Instruments Products for Aquarium Testing.

Test your water with confidence using any of our digital meters for aquariums.


Watch Checker Video Now →

Hanna Marine Line Video for Saltwater Aquariums

Hanna Aquarist Products

Marine Alkalinity (dKH)  - HI772 Alkalinity (dKH) - HI772 

Range: 0.0 to 20.0 dKH
Salt Water 

  Buy HI772 Now →


Marine Alkalinity  - HI755Alkalinity - HI755

Range: 0 to 300 ppm
Salt Water 

  Buy HI755 Now →


Marine Calcium  - HI758Calcium - HI758

Range: 200 to 600 ppm
Salt Water 

Buy HI758 Now →


Phosphorus Ultra LR - HI736
Phosphorus - HI736

Range: 0 to 200 ppb
Salt Water 

  Buy HI736 Now →


Phosphate LR - HI713
Phosphate - HI713

Range: 0.00 to 2.50 ppm
Salt Water 

  Buy HI713 Now →


Marine Nitrite ULR- HI764
Nitrite - HI764

Range: 0 to 200 ppb
Salt Water 

  Buy HI764 Now →


TDS Tester - HI98301

Range: 0 to 2000 ppm (mg/L)
Salt Water  & Fresh Water

  Buy HI98301 Now →  




Checker® Plus pH Tester - HI98100
pH Tester - HI98100

Range: 0.00 to 14.00 pH
Salt Water  & Fresh Water

  Buy HI98100 Now →


Digital Refractometer for  Seawater Analysis - HI96822
Seawater Refractometer - HI96822

Range: 1.000 to 1.114 Specific Gravity; 0 to 50 PSU; 0 to 150 ppt 
Salt Water 

Buy HI96822 Now →  


pHep®4 pH/Temperature Tester - HI98127pH Tester - HI98127

Range: -2.0 to 16.0 pH
Salt Water  & Fresh Water

  Buy HI98127 Now →


HALO PEI Body Gel Filled pH Electrode  with Bluetooth® - HI12302Wireless pH Meter - HI12302

Range: -2.000 to 16.000 pH
Salt Water  & Fresh Water

  Buy HI12302 Now →


HI98108-300by250.jpgpHep+ - HI98108

Range: 0.0 to 14.0 pH
Salt Water & Fresh Water

  Buy HI98108 Now →


Aquarium Testing Charts & Blogs



Phosphorus to Phosphate Conversion Table
Download Your Free Copy Right Now


Read our blog on Digital Testing 
for Saltwater Aquariums from Hanna


Saltwater Aquarium Water Parameters Guidelines

Download Your Free Copy Right Now


Aquarium Product Videos

Hanna Marine Checker Full Line

Watch Hanna Marine Checker Line

Measure Calcium 

Watch Video on Calcium Checker

Measure Alkalinity in dKH 

Watch the Alkalinity dKH Video

Measure Alkalinity in ppm

Watch the Alkalinity ppm Video

Measure Phosphorus Ultra Low Range

Watch the Phosphorus ULR Video

Measure Nitrite Ultra Low Range

Watch the Nitrite ULR Video



Review of Marine Alkalinity (dKH) Checker® HC - HI772

Great product, easy to use, and much more accurate than Salifert. Would buy again and recommend to others.

Review of Marine Phosphate Low Range Checker® HC - HI713

Quick and accurate way to test phosphates. Much better than trying to match a shade of a color.  

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