I've done a lot more still runs than making mash so very new mash wise and have a few questions about the mash and generations etc.
1. Once it's finished fermenting do you have to rack it off? or can you just use the yeast bed at the end after you have emptied the fermenter weeks/months later?
2. Do I need the yeast bed/remaining corn,grains etc for generation or just the strained backset from the still? to be able to make a generation?
3. how long would the yeast be usable if you wanted to reuse the yeast from the previous generation? if it sat for 1 month to clear then I made another mix and chucked some yeast bed in when it hit 30°
4. Can I freeze backset if its going to be a while before I use it again? or just seal it in a container with no oxygen...?
5. If doing allgrain do I need malted barley or alpha amylase?
Is there anything else I should know?