DIY Refractometer Calibration Fluid Question

[ReefMedic15]

Hey Y'all!

Just a quick question. I intend on using Randy's recipe for DIY refractometer calibration fluid, but I noticed the recipe specifies Morton Iodized table salt. Is this a hard specific that I need to follow? Or can I use Costco brand sea salt instead? Or a different, store brand iodized salt? Thanks!

 

[Randy Holmes-Farley Verified Community Expert]

If you use mass (weight), any dry table salt (not sea salt) should be the same.

 

[Randy Holmes-Farley Verified Community Expert]

Do not use sea salt. It should be sodium chloride.

 

[ReefMedic15]

Excellent, thank you!