Refractometer calibration

[maxalmon]

I used R.O water to calibrate my refractometer, it's the same water I use to make my SW. Put 2 drops (not SW) on lens and then dialed down to zero, is this correct?

 

[reefreak29]

yes but i would even use di water

 

[maxalmon]

Is the stuff you get in a plastic gallon bottle at the grocery store ok, says DI, just wondering about quality readings

 

[volcom69]

i dont know how much i would trust grocery store di water in my opinon i dont know if i would i still think there are some chemicals that are not good for ur tank in there.

 

[maxalmon]

Is there any company that sells a calibration fluid especially for refractometers?

 

[texasstone5]

RO water (I assume that it is home made RO) will work just fine. Distilled water will also work, but stay away from bottled beverage water (some contain lots of minerals). Tap water works too.

 

[reefreak29]

max just use your ro im just anal.(im a lab geek)

 

[maxalmon]

Originally Posted by reefreak29
max just use your ro im just anal.(im a lab geek)
It's ok, we forgive you...LOL

 

[texasstone5]

just curious, when you calibrate with RO or DI what does tap water read?

 

[madman33]

Did your refractometer not come with calibratiuon fluid??? Most of them some with some thats exactly either 1.025 or 1.000