FerMonster 3 Gallon Plastic Fermenter

The FerMonster 3 Gallon Plastic Fermenter is a lightweight, clear PET fermentation vessel designed for small batches, experimental brews, split batches, and secondary fermentation. Its compact size and wide-mouth design make it an excellent choice for beer, wine, cider, mead, kombucha, and other fermented beverages.

Ideal for Small-Batch Brewing

The 3-gallon capacity is particularly useful for 2 to 2.5-gallon batches where additional fermentation headspace is desired. It is also a convenient vessel for dividing a larger batch to experiment with different yeast strains, hops, fruit, oak, spices, or other ingredients.

Wide-Mouth Design

The large 4-inch opening provides easy access to the interior of the fermenter. This makes filling, cleaning, dry hopping, fruit additions, and other fermentation tasks considerably easier than with a traditional narrow-neck carboy.

Clear PET Construction

The FerMonster is made from food-grade BPA-free PET plastic. Its clear construction provides excellent visibility so you can monitor fermentation activity, yeast sediment, clarification, and ingredient additions without opening the vessel.

Smooth and Easy to Clean

The thick PET walls provide strength without requiring ribs or deep surface textures. The resulting smooth interior gives yeast and sediment fewer places to collect and makes cleaning and sanitation easier between batches.

O-Ring Sealed Lid

The threaded lid uses a sealing O-ring to provide a tight fermentation seal. The included drilled lid accepts a #10 stopper, allowing an airlock or blow-off assembly to be installed for active fermentation.

Features

• 3-gallon capacity
• Ideal for approximately 2 to 2.5-gallon fermentation batches
• Food-grade PET plastic construction
• BPA-free materials
• Crystal-clear body for easy fermentation monitoring
• 4-inch wide-mouth opening
• Smooth ribless interior
• Punted bottom helps direct sediment away from the center
• Lightweight and easy to handle
• Taste and odor resistant
• Includes drilled lid and sealing O-ring
• Lid accepts a #10 stopper
• Approximately 14.6 inches high
• Approximately 9 inches in diameter
• Temperature limit of 140 degrees F
• Suitable for beer, wine, cider, mead, kombucha, and other fermented beverages

Brew Tips

Clean and sanitize the fermenter, lid, O-ring, stopper, airlock, and any equipment that will contact your wort or finished beverage before use. Use a soft cloth, sponge, or other non-abrasive cleaning tool to protect the PET surface from scratches. Allow sufficient headspace for active fermentation and consider using a blow-off tube when fermenting particularly active yeast strains.

Why Choose a FerMonster?

The FerMonster combines the visibility of a traditional carboy with the convenience of a modern wide-mouth fermenter. The compact 3-gallon size is especially useful for small batches and brewing experiments while retaining the easy cleaning, lightweight construction, and clear visibility of larger FerMonster fermenters.