sugar vs molasses

[justlikethis]

I made a molasses wash using 16 g Lallemande's EDV493 yeast and 4 g Fermaid K, molasses mixed with water to 21 brix. It finished in about 2 days.
I made a sugar wash using the same 16 g yeast and 12 g Fermaid K. I mis-measured the nutrient with my scale, and didn't realize until I mixed it in; I was going to use the same 4 g. I used 6 lbs. sugar and 14.3 liters water.
It has now been 3 1/2 days and the sugar wash is still going, maybe a bubble every 2 seconds.

Is it usual for sugar ferments to take longer than molasses? I wonder if it's something to do with the extra Fermaid K I put in.

[Dnderhead]

Both calculate to about 10% wash but since molasses is only about 1/2 sugar (depends on type of molasses,the rest is unfermentabul that will mess up the reading)so the molasses wash is about 5%? . when doing calculations on washes with unfermentabels you need OG (original gravity) and FG (final gravity)
the difference is what you go by. and the more sugar the longer it will take.

[justlikethis]

The molasses finished at 8%. It started at 1.085 sg and finished at 1.023.
The sugar started at 1.060 sg. I used enough sugar to produce about 10%. It's still going...

[justlikethis]

After 5 days my sugar wash was 5% alcohol. Screw the sugar, I'll stay with molasses.

[violentblue]

I did a brown sugar wash, using a bastardised version of the Pugirum recipe.
piched the yeast bomb and it fermented dry in 36 hours @ 9% abv