Salinity testing

[Ariel'sMom]

Hello,
I’ve been using a refractor to test my salinity but lately have had issues with the results and would like to get opinions on the best one to now buy. I have a 47 gallon tank.
Thank you!

 

[Pistondog]

Can you describe your issues, and what you currently use?

 

[LiLinka]

Refractometer works perfectly fine. I find it very accurate and simple to use. You can get a digital one like Milwaukee’s but they get out of calibration often.

 

[Patx]

calibration is the key of all model.

 

[Ariel'sMom]

I use the Aquatic Refractometer by Imagitarium. I calibrate it using RODI water. My last reading was 1.021 and the reading from my local aquarium store (OSA) read 1.027. I did not make any changes. My fish and corals have been fine. But now not sure if I can be secure with my readings. Should I replace the refractometer? Thank you!

 

[Pistondog]

Try to calibrate with rodi. Move the ring until it reads 1.000 specific gravity.
Or get/make a calibration solution around 1.025 sg.
Some of us use these, same idea, little better quality.
Vee Gee Scientific STX-3 Handheld Refractometer, with Salinity Scale, 0-100, +/-1.0 Accuracy, 1.0 Resolution https://a.co/d/4Bzohuo

 

[Reefer Matt]

I suggest calibrating the refractometer closer to the range you are measuring. Calibration solutions like this will help.

AccuBrate Refractometer and Hydrometer Salinity Calibration Fluid – Solution to Accurately Calibrate Refractometer and Hydrometer for Testing Natural Saltwater or Synthetic Sea Water (60 ml) https://a.co/d/0R5aM6Y

 

[Ariel'sMom]

I suggest calibrating the refractometer closer to the range you are measuring. Calibration solutions like this will help.

AccuBrate Refractometer and Hydrometer Salinity Calibration Fluid – Solution to Accurately Calibrate Refractometer and Hydrometer for Testing Natural Saltwater or Synthetic Sea Water (60 ml) https://a.co/d/0R5aM6Y

Thank you! The directions that came with this one never mentioned anything except to calibrate to zero with distilled water. I wouldn’t have known I had a problem until my sample was tested at the store. Learning every day!