"I just got my first marine set up and first hydrometer.The instructions on this one say to dip a bottom corner in water and wait till it fills up with water.what corner and how deep?I've tried for a hundred times ,different ways and angles,and it didn't work,so I filled it with water from the top opening and the reading was at its max,no matter whether the water was actually salt treated or not!!!
Very confusing and frustrating !!!
Tomorrow I'm bringing it back to trade for something decent."