I'm just getting into all grain brewing. And I'm wondering why my gravity is lower. How long should sparging take. The beer I brewed yesterday was suppose to have a gravity of 1.078. The gravity I got was 1.064. I know it's not a big deal it will just have less alcohol. But I just want to know why I'm getting such low gravity. Am I not sparging long enough or what. I think the sparging only took me about 30 mins. my Temps for mashing were pretty dead on. Maybe 1 or 2 degrees high but nothing to be concerned about I think. And help is appreciated