The fermenter is where beer is actually made: the yeast turns wort into beer over a week or two, and the vessel needs to be clean, sealed and the right size for your batch. The classic choices are a plastic bucket, a glass carboy or a lighter PET carboy, and controlling the temperature makes a bigger difference than many beginners expect.
I have picked the fermenters, carboys and fermentation gear worth buying, and set out how to choose. Every pick links to its page on the shop, and the boxes show the current price.
The best fermenters and carboys, ranked
| Rank | Pick | Type | Best for | Price |
|---|---|---|---|---|
| 1 | FastTrack Fermentation Bucket with Spigot | Bucket fermenter with spigot | An easy first fermenter | $33.04 |
| 2 | Italian 5-Gallon Glass Carboy | Glass carboy | A see-through, long-life vessel | $82.56 |
| 3 | FastRack 6-Gallon PET Carboy | PET carboy | A lightweight, unbreakable carboy | $32.95 |
| 4 | Inkbird ITC-308 Temperature Controller | Temperature controller | Controlling fermentation temperature | $36.00 |
| 5 | FastRack 3-Piece Airlock | Airlock set | Sealing the fermenter | $8.95 |
The top picks at a glance
Swipe through the shortlist, then read the full write-up on any pick below.
What the top fermenters and carboys cost
Fermentation gear ranges from a cheap airlock to a glass carboy or a temperature controller. Here is what the shortlist costs so you can budget a setup.
The takeaway: a bucket or PET carboy is the cheap, practical way to ferment, while a temperature controller is the upgrade that most improves the beer. Glass lasts but is heavy and breakable.
How to choose a fermenter
Three things decide which fermenter suits you. Match them to how you brew and the choice is easy.
- Material. Plastic buckets are cheap, light and easy to clean but scratch over time. Glass carboys are inert and see-through but heavy and breakable. PET carboys are a light, unbreakable middle ground.
- Size. Match the fermenter to your batch plus headspace for the foamy krausen, so a 6 to 6.5 gallon vessel suits a 5-gallon batch. Too small and it overflows during active fermentation.
- Temperature control. Fermentation temperature shapes flavour hugely. A controller with a heater or fridge keeps it steady and in range, which is one of the biggest upgrades a homebrewer can make.
- Sealing and accessories. A good lid or bung and an airlock keep air out and let CO2 escape. A spigot on a bucket makes bottling easier, and a brush keeps a carboy clean.
Beginners obsess over recipes, but fermentation temperature is where good beer is won or lost. A cheap controller that holds a steady temperature will improve your beer more than almost anything else.
Dan Smullen, Beer Is My Life
Best Overall: FastTrack Fermentation Bucket with Spigot
A food-grade bucket is the easiest first fermenter: light, cheap, easy to clean and simple to fill and empty. This FastTrack one has a spigot so you can bottle straight from the tap without a siphon. For most homebrewers, especially beginners, this is the sensible, practical pick. Just replace it when it scratches.
- Light and easy to handle
- Spigot for easy bottling
- Cheap and beginner-friendly
- Simple to clean and fill
- Plastic scratches over time
- Not see-through to watch fermentation
Best Glass Carboy: Italian 5-Gallon Glass Carboy
Glass is inert, does not scratch or hold flavours, and lets you watch fermentation happen, which many brewers love. This 5-gallon Italian carboy is the pick for a long-life vessel, especially for longer conditioning where you want no oxygen ingress. The trade-off is weight and the care glass needs.
- Inert glass, no scratches or flavours
- See-through to watch fermentation
- Great for long conditioning
- Lasts for years if cared for
- Heavy and breakable
- Awkward to clean and carry
Best PET Carboy: FastRack 6-Gallon PET Carboy
A PET carboy gives you the shape and clarity of glass without the weight or the risk of shattering. At 6 gallons it has room for a 5-gallon batch plus the foamy krausen, so it is the pick if you want a see-through carboy you can actually lift safely. Lighter, safer and easier to live with than glass.
- Light and unbreakable
- See-through like glass
- 6 gallons, room for krausen
- Safer to carry than a glass carboy
- Plastic scratches over time
- Handle to avoid scuffs that harbour bacteria
Best Temperature Control: Inkbird ITC-308
Not a fermenter, but the upgrade that most improves your beer: the Inkbird controls a heater or a fridge to hold fermentation at a steady, chosen temperature. Stable temperature means cleaner, more consistent beer, and this is the best-reviewed item in the category. Add it once you are past your first few brews.
- Holds a steady fermentation temperature
- Controls a heater or a fridge
- Cleaner, more consistent beer
- Best rated here
- Needs a fridge or heater to control
- An upgrade, not a first buy
Best Airlock: FastRack 3-Piece Airlock
An airlock is the cheap, essential part that lets CO2 escape while keeping air and bugs out. This FastRack 3-piece set means you always have a spare, and they suit buckets and carboys alike. Not glamorous, but every fermenter needs one, so buy a couple.
- Lets CO2 out, keeps air out
- Cheap, and you get three
- Fits buckets and carboys
- Always have a spare
- A basic essential, not exciting
- Keep them clean and sanitised
Other fermenters and carboys worth a look
A couple more useful bits:
- 2 Pack 28 inch Carboy Brush Carboy Cleaning Brush Carboy Bottle Brus a long carboy brush for cleaning narrow-necked vessels.
- Fastrack 6.5 Gallon Fermenting Bucket with Lid | White a larger lidded fermenting bucket if you want a spare vessel.
Which fermenter should you buy?
For a first fermenter, a bucket with a spigot is the cheap, practical choice, or a PET carboy if you want to watch fermentation without the weight of glass. Add an Inkbird controller once you are past your first few brews, since steady temperature is the biggest upgrade, and always keep a spare airlock.
Browse the full range on the fermenters and carboys page, or see the parent beer starter kits section for more.
Fermenter FAQs
Bucket or carboy, which is better for fermenting?
A bucket is cheaper, lighter and easier to clean and fill, which suits beginners, and a spigot lets you bottle straight from it. A carboy is see-through and inert, better for longer conditioning, but heavier (glass) or scratch-prone (PET). Many brewers use both.
What size fermenter do I need for a 5-gallon batch?
Around 6 to 6.5 gallons, to leave headspace for the foamy krausen during active fermentation. A vessel sized exactly to the batch will overflow through the airlock in the first few days.
Is glass or plastic better for a carboy?
Glass is inert and does not scratch, so it will not harbour bacteria and it lets you watch fermentation, but it is heavy and can shatter. PET plastic is light and unbreakable and nearly as clear, but it scratches over time and should be handled with care.
Do I need a temperature controller to brew beer?
Not to get started, but it is one of the best upgrades you can make. Fermentation temperature strongly affects flavour, and a controller that holds a steady temperature gives cleaner, more consistent beer batch after batch.
