i know you want as little as possible to keep oxygen contact to a minimum. However, my smaller batches are about 3 gallons or so. I've got the small 2 gallon buckets and 5 gallon buckets and carboys. I've been splitting the batch into 2 small buckets and splitting the yeast. Nosybear had recommended using plastic wrap on top of wort when kettle souring to keep oxygen away. I'm wondering if I could do something similar to fermenting beer in a 5 gallon bucket. would this be a cheap solution or a bad idea? obviously this isn't ideal, and a CO2 canister would be better. or i could just get a 3 gallon bucket.