Review on Hydrometer Test for Wine and Kombucha by Chefast by Paul Wilson

Instructions for use for this product are restricted. However, the detailed e-book instructions link sent with this product is broken and not working. I contacted the seller but never received a reply. This defeats the purpose of using a hydrometer when calibration is disabled and I have no way of calibrating it. Seller if you are reading this please send me the e-book link. UPDATED 6/8/2020: After a 2 star rating and another attempt to contact the seller for hydrometer instructions, they emailed me the hydrometer calibration documents. areometer. I give it a 4 because of the hassle I had to go through to get instructions as the hydrometer arrived uncalibrated.