Will this work on well water?

It will work on any type of water. Well, city, salt. If it has nitrates in it this checker will see them. Only complaint is it doesn’t come with a lot of reagent packs and they are hard to come by currently. But it is absolutely a great investment for accuracy and peace of mind.

Can I add some marine salt to my freshwater sample to make this work for freshwater?

Go on to Reef2reef discussion boards and direct your question to Randy Holmes Farley he's the chemist. He usually gets back to you fairly quickly. My honest answer though, you'd be better off with Tetra strips. They're plenty accurate enough for fresh water applications and cheap enough.

Hanna Instruments High Range Nitrate Checker Hi 782

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Description

🌊 Dive into precision—master your marine nitrate levels with ease!

TRUSTED BY EXPERTS - Highly rated for accuracy and durability, backed by Hanna’s reputation and long battery life.
COMPACT MARINE READY - Small, portable design tailored for saltwater aquariums and marine biology professionals on the go.
SIMPLIFIED LAB ACCURACY - Achieve reliable, lab-grade results with just one reagent—no complex prep needed.
EFFORTLESS DIGITAL OPERATION - Intuitive digital display eliminates guesswork and color matching errors for fast, confident readings.
PRECISION AT YOUR FINGERTIPS - High range nitrate detection up to 75.0 ppm ensures you never miss critical water quality shifts.

The Hanna Instruments HI782 is a compact, digital nitrate checker designed for saltwater aquariums and marine applications. It offers high range measurements up to 75.0 ppm with lab-grade accuracy using only one reagent. Its intuitive digital readout eliminates color matching errors, making it ideal for professionals seeking reliable, fast, and portable nitrate testing.

Specifications

ASIN	B098H54LH5
Batteries	1 AAA batteries required. (included)
Batteries Included	Yes
Color	Lavender
Customer Reviews	4.6 4.6 out of 5 stars (663)
Date First Available	5 July 2021
Item Weight	0.29 g
Item model number	HI782
Number of Items	1
Package Dimensions	19.41 x 12.5 x 6.81 cm; 0.29 g
Quantity	1
batteries required	No

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Hanna Instruments High Range Nitrate Checker HI 782

Description

Specifications

Common Questions