Is this any use for hydroponics?

It is used for testing the salt water fish tank.

I want to test the brackish canal water to see if i can use it for irrigation. will this tester work? I was told to check the salinity of the canal

Yes, brackish water ranges between 0. 05 to 30 PPT

What does this come with

All you get is the refractometer, case and a small screwdriver for adjusting it. Unless they have added something since we bought ours about a year ago. It will not let me post a picture or I would.

Hi, i bought a calibrating fluid and calibrated my refractometer to sg 1.026 but when i test it on distilled water it reads 1.010. why is that?

According to R Homes Farleys article this is because this refractometer was made to measure pure salt solutions and they don’t have the exact reflective index of sea water that has some additional elements. Therefore calibrating with a solution that matches the reflectivity of seawater at 35ppt is needed and once done it will not measure distilled or Rodi water accurately. But you will have a more accurate measurement for your salt water aquarium.

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🌟 Dive into Precision with Every Drop!

BUILT TO LAST - Crafted from durable chromium, this refractometer is designed for long-term use in any marine environment.
DUAL MEASUREMENT SCALES - Easily switch between Specific Gravity and parts per thousand for versatile monitoring.
COMPLETE KIT FOR CONVENIENCE - Includes hard case, dropper, screwdriver, user manual, and cleaning cloth for all your needs.
PRECISION AT YOUR FINGERTIPS - Accurate salinity measurements from 0-100 PPT for optimal marine health.
AUTOMATIC TEMPERATURE COMPENSATION - Ensures reliable readings regardless of temperature fluctuations.

The Salinity Refractometer is an essential tool for marine fishkeeping enthusiasts, providing precise salinity measurements from 0-100 PPT. With dual measurement scales and automatic temperature compensation, it ensures accurate readings in any condition. The durable chromium construction and complete accessory kit make it a reliable choice for both hobbyists and professionals.