Making vinegar
Top answer
From the KNF library
Drake sees no reason to hold back. He says the difference between FFJ and FPJ is "none that matters" because it is all plant food. (Office Hours Aug 2025, 50:58)
He also prefers vinegar to rewashing. After draining the juice, he says it is better to turn the leftovers into vinegar than to rewash the mash for more juice. (Office Hours Oct 2025, 32:39)
On the why, Drake says a fermented liquid left open to air turns to vinegar. Alcohol only stays alcohol if sealed airtight. (Office Hours Ep. 17, 30:20) He also says adding water to FPJ turns it into vinegar. (Office Hours Ep. 28, 54:50)
When the vinegar is done, strain off the solids. Then lightly raise the temperature so scobies stop growing back. (Office Hours Ep. 53, 7:33)
The library gives no ratio for residue itself. It says nothing about low sugar in the leftover material.
Sources
- 7:33 Office Hours Ep. 53 (Oct 2022) — Livestock Feed Ratios, Water-Soluble Calcium, Ensiling with IMO4 · “Strain them off, then lightly raise the temperature so scobies stop growing back.”
- 54:50 Office Hours Ep. 28 (Apr 2022) — Beef Aminos, Coral Calcium, and IMO Troubleshooting · “don't add water — that turns it into vinegar”
- 50:58 Office Hours (Aug 2025) — Yeast Solutions, Seawater Dilution Ratios, FPE vs FPJ · “None that matters — throw out the acronyms, it's all plant food”
- 32:39 Office Hours (Oct 2025) — FPJ Sinks vs Sources, IMO4 Bog Soil Myth, Bee Feed Without Sugar · “better to turn the leftovers into vinegar or feed them to livestock.”
- 30:20 Office Hours Ep. 17 (Feb 2022) — Biochar Activation, Fish for FAA, and Fruit Sweetness Formula · “leave wine exposed to air and it will turn to vinegar; alcohol only stays alcohol if sealed airtight.”
