I'm not sure if it is finishing hydrometer it has a tralle scale one side and a proof scale on the other. When I bought it at the beer supply store I just asked for a hydrometer.
Its been 15 days and my hydrometer still has no reading - by this I mean it just floats near the bulb of the base; it does not even get close to zero. It is calibrated and will read zero when placed in water. And it is at the correct temperature, etc. I'm doing a porter kit and followed all...