I took some readings in some fresh must that was just crushed.
It seemed hard to check SG with a hydrometer, as there are lots of
particles in the must. Seems this would skew the readings.

My initial readings.

TA .58
pH 3.80
SG 1.115

I added enough TA to increase it by 1%. I also added meta, enzyme and
nutrient
After stirring up the must I took readings again.
TA .55
pH 4.05
SG 1.110

What is the best way to get a good sample of must for tests?
Does the material floating in the must effect the readings?