Review on 🌊 Aqua Craft Standard Seawater 35 ppt Refractometer Calibration Solution - Accurate and Convenient 60 ml Solution by Erin Walker

Be skeptical about this product. Its accuracy is not guaranteed and I would not simply rely on it. I thought it would be helpful to check/calibrate my Milwaukee digital refractometer with this product. I assumed it was done by professionals and at first thought my device was off by 1 ppt even after many attempts to calibrate with RODI. As a result, I have started adapting my 3 aquariums to the salinity of this product. My corals and livestock were fine, but I came across an article from reef2reef that describes how to make your own calibration solution. I'm very accuracy conscious and have used higher resolution scales to weigh salt and RODI to the hundredth of a gram. I finally tested my homemade calibration fluid and found that my refractometer works 100% and this product is off by 1 ppt. Personally, that's too big a mistake for me. I'm disappointed that it's unreliable but glad my refractometer is reliable. To make your own calibration fluid: Use 3.65 g table salt and 96.35 g RODI. That's 35 pages.