Fermentation Maintenance Protocol

The full maintenance cycle for the 40-gallon medicinal ferment. Frequency is critical — the ferment is a living system that responds to management.

Daily

• Check brine level — top up with fresh 3.5% salt solution if evaporation has reduced level
• Visual check — no kahm yeast film on brine surface, all botanicals fully submerged
• Temperature check — record vessel temperature, confirm 18–22°C
• Sensory check — clean sour smell confirms healthy fermentation

Weekly

• pH measurement — test brine with pH strips or meter, target 3.2–3.8 mature. Take corrective action if out of range.
• Rotate one botanical bag group — B1→B2→B3→B4 in staggered 4-week cycle. Never replace all groups simultaneously.
• Add honey culture — 200–300ml freshly activated honey culture from designated perpetual mother (rotating monthly variety)
• Taste sample — assess sourness, flavor complexity, off-notes

Monthly

• Replace 25–30% of vegetable fraction with fresh minced material
• Add fresh glycine and ascorbic acid to brine (~20% monthly depletion)
• Full vessel interior inspection — check for deposits, discoloration
• Assess bubbling activity — mature ferment: slow steady bubbling is normal
• Harvest production quantity for concentration/packaging cycle
• Feed all perpetual mother culture jars (remove 50%, replace)
• Prepare new oxymel for the month's featured honey variety

Quarterly

• Partial brine renewal — remove 20%, replace with fresh prepared brine
• 50% botanical pack replacement — all bag groups refreshed in staggered rotation
• Full emulsifier/carrier refresh (lecithin, black seed oil, glycerol)
• Production batch concentration cycle (freeze concentration of brine fraction)
• Viability check on selected glycerol culture stocks

Annual

• Reserve 10–15% brine as starter culture — this established Lactobacillus community is the most valuable asset; label and refrigerate separately before emptying
• Full vessel empty and deep clean with hot water + food-grade vinegar rinse
• Air dry completely before restart
• Restart with fresh batch, 10% reserved brine as starter inoculum
• Comprehensive culture bank audit

Contamination Identification

Observation	Likely cause	Action
White film on surface	Kahm yeast (harmless)	Remove film, ensure submersion, lower temperature
Pink/red discoloration	May be normal (red cabbage) or contamination	Taste/smell assessment — if off-odor, partial brine renewal
Putrid/strongly rotten smell	Pathogenic contamination	Do not consume; investigate; possible batch restart
Strongly alcoholic	Yeast overgrowth	Lower temperature, check salt level
pH > 4.5 after 2 weeks	Fermentation not establishing	Check temperature, salt, water source (chlorine?); add mature brine
Slimy texture	Some Lactobacillus exopolysaccharide production	Usually safe; investigate if accompanied by off-odor

Connections

• [[System Architecture]] — system parameters
• [[Brine Formulation]] — what needs replenishing
• [[Botanical Pack]] — rotation schedule
• [[Honey Culture System]] — weekly culture additions
• [[Concentration and Harvest]] — monthly production