FermZilla & PET Carboy Cleaning Brush - Soft Non-Scratch BristlesMaintain the hygiene of your plastic fermenters with the PET Carboy Cleaning Brush. Unlike standard stiff wire brushes that can scratch the delicate surface of PET carboys (like FermZilla or FerMonster), this brush features specialized soft non scratch bristles. Scratches in plastic are the #1 hiding place for bacteria and wild yeast; this brush allows you to thoroughly scrub away krausen and sediment while protecting the smooth internal finish of