## Yeast Propagation — Cost Correction (Apr 1, 2026)### Old Practice (wasteful)- 110 gal: 7.5 lbs DME propagation + brick yeast = ~$41.50/batch- 70 gal: 3.5 lbs DME propagation + brick yeast- Pitch rate was still borderline under### New Practice (optimal)- Direct pitch from brick: 75–100g per 110 gal batch- 100g from 500g brick = 5 batches = $33/batch yeast- Zero DME cost for propagation- Proper pitch rate achieved### Key Numbers (LD Carlson prices)| Item | Price ||---|---|| DME Briess 50 lb | $110.00 || Nottingham brick 500g | $165.00 || Nottingham satchel 11g | $3.59 (MoreBeer) |### Realization- Full propagation (10 lb DME) costs nearly as much as direct pitch from brick- Simple propagation (1 lb DME) saves only ~$7/batch vs direct pitch- Underpitching + DME propagation was the worst of all worlds: expensive AND underpitched- Brick direct pitch is the move for 3.5 bbl Nottingham batches