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 Hi782 High Range Nitrate Checkers

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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S$215

Duties & taxes included

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Sold byAmazon SINGAPOREDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Measure Like a Pro, Wherever You Go!

SIMPLIFIED LAB ACCURACY - Achieves laboratory-grade results with just one reagent—no complex prep needed.
COMPACT PORTABLE DESIGN - Take accurate measurements anywhere—home, office, or field.
READY TO USE OUT OF THE BOX - Includes AAA battery for immediate operation—no extra purchases required.
PRECISION AT YOUR FINGERTIPS - High range detection up to 75.0 ppm for reliable nitric acid measurement.
USER FRIENDLY DIGITAL INTERFACE - Intuitive digital controls make testing effortless, even on the go.

The Hanna Instruments HI782 is a compact, portable nitric acid checker offering precise measurements up to 75.0 ppm with lab-grade accuracy using a single reagent. Its intuitive digital interface and included battery make it perfect for professionals needing reliable, on-the-spot testing at home, work, or in the field.

Specifications

ASIN	B098H54LH5
Amazon Bestseller	#194,499 in Pet Supplies ( See Top 100 in Pet Supplies ) #2,469 in Aquarium Water Quality Testing & Treatment
Batteries	1 AAA batteries required. (included)
Batteries Included	Yes
Customer Reviews	4.6 4.6 out of 5 stars (657)
Date First Available	October 25, 2022
Item model number	HI782
Number of items	1
batteries required	No

Reviews

W**N

Optimal

11.03.2025

C**T

Works great! accurate and reliable as always with Hanna. Great battery life and compact case, easy to follow instructions.

11.06.2025

M**C

Excellent! Bye Salifert :)

24.01.2026

A**R

Makes measuring Nitrate ease and accurate.. so don’t need to rely upon comparing colour chart and making judgement about the reading… thanks marine addict

9.09.2023

I**N

Item well received as always. trusted packaging from Amazon!

23.01.2024

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