I got this refractometer from drsfostersmith.com, it was on sale and I have been wanting one. Anyways I was reading how to calibrate it and it says I need distilled water. Can I use tap or bottled or does it have to be distilled. Just wondering before I go running out to the store to buy a jug of distilled water for just a few drops.
You want to use as pure of water as you can to calibrate the unit. The reason is that any level of impurities can affect the light refraction thru the prizim. So to set your base line you want to use the best quality water you can.
__________________ Remember dont tap the glass, your fish will think you're an idiot-Anonymous mother
I just got my refractometer a couple weeks ago and used distilled water to calibrate it. I drink a good bit of bottled Aquafina water when I'm at work, so I decided to take a look at that with the refractometer (love new toys hehe) and it reads exactly what the distilled water reads. Aquafina is not labeled as spring or mineral water. It just says purified drinking water so I guess that would do in a pinch if you don't have any distilled water?