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View Full Version : calibrating refractometer, ro/di ok?


bigfruits
05/03/2006, 02:56 PM
i just got a refractometer that came without instructions. i found a website with instructions and it said to use distilled water to calibrate sg to zero. will ro/di water work?

dwdenny
05/03/2006, 02:58 PM
I think some do use their ro/di. I think distilled would be better unless you know that you TDS on your ro/di is zero.

bigfruits
05/03/2006, 03:31 PM
i tested ro/di and it read zero so i guess no calibration is needed... looks like what my hyrdrometer read as 1.025 is really 1.022. ive had a colony of zoos die recently, you think that could have contributed to it or is 1.022 not a big deal? ill slowy raise it up over the next few days.