30 gal BK, 20 gal HLT, & 20 gal MT. I plan on doing 15 gallon batches so a 20 gal BK would have been pushing it for higher gravity brews. I really wish they, or anyone for that matter, offered a 25 gallon BK as that would be perfect for 15 gallon batches. Unfortunatley, this 30 BK may be too...