Standard glass carboys have been used for fermenting homebrew and wine for decades. All sizes fit saize 6.5 – 7 stoppers.
- 3 gallon size is great for small batch brewing and secondary storage/ageing of wine, mead, and beer.
- 5 gallon size is the tried and true size for all fermentations, but can function great as a secndary storage/againg vessel too.
- 6 and 6.5 gallon sizes are great for larger starting volumes and during primary fermentation stage providing addition head space for those extra active fermentations and minimizing blow-off spilage.