I've been trying to read up on how to brew before I try my first batch. It seems that from difference sources, there are a few different variations to brewing that made me kind of confused and I hope you guys can help me out by answering some of these questions for me.
1) Does it matter how much boiled water to add into the brewpot? From one source, it tells me to add one gallon while another it says to use 3 gallons (both are for 5 gallon batch). I would think it would be the same once everything is mixed to make 5 gallons.
2) How important is it to have a thermometer and is it really necessary to get the water boiling up to a certain temperature? What happens if the boiling temperature is too low or too high?
3) Is it really necessary to have an airtight primary fermentor? I've been browsing the forum and it seems people are worried about oxygen getting into their batch. It seems that if the oxygen can travel through the plastic, does it really matter if the lid is airtight?
I think those were the main questions that have been bugging me. Any input would be great. I hope I wasn't to vauge or confusing when asking these questions.
Thanks in advance