This is probably a stupid question, but I'm just a bit worried as it's my first brew. There appears to be a lot of white stuff at the bottom of my fermenter, now my first guess would be its undissolved sugar as its only been brewing 12hrs, would this be enough time to build up anything else such as Trub?
I mixed my 1kg bag of sugar with 2 litres of boiling water before adding to the fermenter so I thought it had disolved. If it is sugar should I stir it up, or will the yeast find it? The brew appears to be fermenting will as there's a massive bubbly head on top.
Cheers for any advice in advance, I'm sure you can sympathise with a brewing novices first time worries.