What can 1 gallon carboys be used for?
When I drain my kettle after whirlpooling, there’s always a gallon or two of gunk down there. I siphon it into a one gallon jug or two, pop it in the fridge, let the gunk settle out, then use the wort for starters. You can freeze it in ziploc bags or chiney foo soup containers. I also use my one gallon jugs for starters, test batches, or experiments with oak, fruit, or dry hops.