Making calobration fluid refractometer

[Michael Gray]

Couple questions.

If I plan on keeping tank at 1.025,should I make calibration fluid to 34ppt. Or should I still make it to 35ppt.

Secondly should I heat up the water to help fully dissolve the iodized salt?? Or just put it in the 96.35g rodi water and shake?

 

[P-Dub]

So, that begs the question, how will you make a calibration solution without calibration solution to assure its accuracy? So little is used going with a premade solution I would think far easier and certainly more accurate/reliable. I have the same bottle for over 18 months and it is not even half used. I test weekly.
Also, Optimal Parameters for a Coral Reef Aquarium: By Randy Holmes-Farley

 

[Michael Gray]

So, that begs the question, how will you make a calibration solution without calibration solution to assure its accuracy? So little is used going with a premade solution I would think far easier and certainly more accurate/reliable. I have the same bottle for over 18 months and it is not even half used. I test weekly.
Also, Optimal Parameters for a Coral Reef Aquarium: By Randy Holmes-Farley

I'd make the fluid per @Randy Holmes-Farley. Should be accurate enough

 

[P-Dub]

I'd make the fluid per @Randy Holmes-Farley. Should be accurate enough

I did not know. Reading now. Thank you.
Link for anyone else not in the know...

http://www.reefkeeping.com/issues/2004-06/rhf/

 

[Michael Gray]

3.65g mortons iodized salt and 96.35 rodi water = 35ppt

 

[Randy Holmes-Farley Verified Community Expert]

I'd make the fluid per @Randy Holmes-Farley. Should be accurate enough

I’d stick to 35 ppt. There’s no big benefit to something slightly different.