Thought I'd move this to a new post under general brewing:
Does yeast in suspension effect a hydrometer reading?
Here is my hydrometer reading of distilled water at 68F (my hydrometer is calibrated to 68F (
And my hydrometer reading the same water immediately after dissolving about 4 grams of Fleishman dry pizza yeast. (Half the packet)
And my hydrometer reading the same water after dissolving another 4 grams into it, total of 8.
There is no sugar, there is no gas being produced. The time involved was about 3 minutes start to finish, once I got my water to exactly 68F. You can see a tiny bit of foam at the top, that's from me shaking it to mix. Naked eye in person, it was all in the top 1/4". Much like taking an FG reading of green beer that still has yeast in suspension. I don't think it's enough to lift the hydrometer 10 points
I think yeast in suspension falsely increases a hydrometer gravity reading.