1. Product Overview
The Mangrove Jack's M66 Hophead Ale Yeast is a specialized blend of yeast and enzymes designed to enhance the aromatic and ester profiles of hop-forward and fruit-forward New England IPAs (NEIPAs), Hazy IPAs, and other similar beer styles. The included enzymes, such as pectinase and beta-glucosidase, work to improve the aroma and flavor derived from late hop and fruit additions, ensuring a vibrant and complex beer. This yeast strain is engineered to provide consistent, high-quality results with every brewing batch.

Figure 1: Mangrove Jack's M66 Hophead Ale Yeast 10.5g packet. This image displays the front of the yeast packet, showing the brand name "Mangrove Jack's", the product name "Hophead Ale Yeast - M66", and text indicating its suitability for New England IPA, Juicy IPA, Hazy IPA, American IPA, and American Pale Ale. It also notes the net weight of 10.5g (0.37 oz).
2. Specifications
| Feature | Detail |
|---|---|
| Product Name | M66 Hophead Ale Yeast |
| Brand | Mangrove Jack's |
| Net Weight | 10.5g (0.37 oz) per pack |
| Suitable Beer Styles | New England IPA, Juicy IPA, Hazy IPA, American IPA, American Pale Ale |
| Alcohol Tolerance | Up to 10% ABV |
| Recommended Fermentation Temperature | 59–75°F (18–24°C) |
| Attenuation | High (74-82%) |
| Treats | 23 Liters / 5-8 Gallons (per 10g pack) |
| Flocculation | Slow and low, eventually settling to moderately clear beer |
| ASIN | B0BW7NHGX7 |
| UPC/GTIN | 733960927079 |
3. Preparation and Usage
3.1. Yeast Pitching
Ensure your wort is at the desired fermentation temperature before pitching the yeast. While specific rehydration instructions are not provided, Mangrove Jack's yeasts are generally robust and can often be pitched directly onto the wort surface. For optimal results, ensure proper sanitation of all brewing equipment.
3.2. Fermentation Conditions
- Temperature: The recommended fermentation temperature range is between 59–75°F (18–24°C). Fermenting within this range will yield balanced aromatics and esters.
- Elevated Temperature: For brewers desiring excessive ester production, this strain can be fermented at temperatures up to 86°F (30°C).
- Onset: Fermentation typically begins within 24-36 hours after pitching.
- Duration: Beers fermented with M66 Hophead Ale Yeast can be ready to drink in as little as 10 days, indicating a quick conditioning time.
4. Storage and Maintenance
To maintain the viability and performance of your Mangrove Jack's M66 Hophead Ale Yeast, store unopened packets in a cool, dry place, ideally refrigerated, away from direct sunlight. Once opened, use the entire packet promptly or store any remaining yeast in an airtight container in the refrigerator for a short period, though immediate use is recommended for best results.
5. Troubleshooting
5.1. Slow Flocculation / Hazy Appearance
The M66 Hophead Ale Yeast is characterized as a slow and low flocculating strain. This means that the yeast cells will take longer to settle out of suspension compared to highly flocculant strains. This characteristic contributes to the desired hazy appearance in styles like NEIPAs. While it will eventually settle out and leave a moderately clear beer, expect a degree of haze, especially in younger beers. This is a normal and expected behavior for this yeast and not an indication of a problem.
6. Important Safety Information
Statements regarding dietary supplements have not been evaluated by the U.S. Food and Drug Administration (FDA) and are not intended to diagnose, treat, cure, or prevent any disease or health condition. Always handle brewing ingredients with care and follow proper sanitation procedures to prevent contamination.
7. Warranty and Support
For specific warranty information or technical support regarding Mangrove Jack's M66 Hophead Ale Yeast, please refer to the manufacturer's official website or contact your retailer. Ensure you retain your proof of purchase for any inquiries.