Hot answers tagged all-grain
This gunk is what's known as "trub", and it is proteins left over from the hot and cold breaks. The experiment conducted here: http://brulosophy.com/2014/06/02/the-great-trub-exbeeriment-results-are-in/ seems to show that it doesn't really matter whether it's included in the fermenter or not, but most people still remove it/don't add it.
A good starting point for fruit additions in 1lb/gl. Strawberries are pretty subtle, though. I added 7.5lb to 5gl of blonde this summer, and the flavor was easily noticable without being overpowering.
There is no particular reason I am aware of that normal fermentations for extract vs. all-grain brews should be different. Perhaps some examples that you've noticed might help? Fermentation time is mostly a function of yeast health, wort oxygenation levels, yeast pitch rate, the gravity of the beer, and temperature. While extract might generally have less ...
I made a Strawberry Saison last Summer and the 1lb/per gallon was a nice subtle flavor, but I think I may raise the to 1.5 pounds next time. Also, I used frozen strawberries which I gently crushed. Let them thaw a bit at the bottom of the secondary and then racked on top of them. The beer was able to use all of the fruit this way.
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