I made my first BIAB few days ago and trying to do Hefe style batch of ~8 litres. I got problem with fermentation which is stopped after 2 days. First off all it took about 18 hours before first bubbles in waterlock and after 1 and half days of hard bubbling there is no bubbling at all. I used wyeast weihenstephan 3068 yeast and put little over half of package. I made rookie mistake with mash temperature which was over 70°C for a while.