Originally Posted by jeremiahjames
I had a thought. When I mixed 4 oz water with dry yeast, it seemed a bit hot. Could this have killed yeast ? Can I still put in more yeast, and is liquid yeast better than dry ? Thx
The water may have been to hot if it felt hot. Just lukewarm water, about 80° to 90°, should be used. Go to the yeast site to look up their specs for the yeast. If they don't have spec sheets, Fermentis has a very good site.
If your wort is at 68° to 70° it is to warm. Fermentation produces heat. Typical rise is 3° to 5°. For a high gravity brew the temp can rise 10°.
A swamp cooler is a large container of water to set your carboy in. Put a cotton towel around the carboy so it wicks up water to stay wet. Point a fan at the wet towel to accelerate evaporation. This will cool the wort in your carboy by 6° to 10°.
If your yeast is dead, and the wort is to warm, you can save your brew by pitching new yeast and setting up a swamp cooler when you return.
There are more types of liquid yeast than dry yeasts. Each yeast can provide a flavor profile which is slightly different. A lot of people only use dry yeast though. With liquid yeasts a starter in required for all but the lowest gravity brews. A starter is never done with a dry yeast. An 11 gram package of dry yeast is sufficient for all brews except the very high gravity beers.
Look up 'blow off tube'. Decide if you need one instead of the airlock for the first three to four days of fermentation.