Hello, I have a fermentation predicament I was hoping that someone might be able to shed some light on.
So I wanted to try and make a base for my Gin. The plan was to make 1000 liters/265 gallons with a mash bill of 225kg / 500lbs of malted barley, 50kg / 110lbs of malted wheat and 25kg / 55lbs of malted rye. Cooking times and temps were no different then when I make a beer. Before I went over to the boil my SG was 1.070. I boiled for only 10 mins and then into the fermenter it went. I cooled it down to about 14c / 57f. Normally a beer wouldn't be that cold but its winter down here in Chile and the tap water through the heat exchanger was super cold.
I want to try a new yeast. It's supposed to be this "super yeast" because it will ferment at temps ranging from 10-25c / 50-77f and an alcohol tolerance of 16% or more. It is called EC-1118 and I pitch 500grams although I only really needed 250g....according to the packaging.
The tank temp stayed around 14c / 57f for a week. After a week the bubbling had stopped. I checked the SG and I was at 1.024 or 6%abv. I was hoping the super yeast would be giving me 9%... So, blew CO2 into the bottom of the tank to pick up all the yeast that had settled, heated the tank up to a temp of 18c / 64f and let it sit for another week. The temp eventually went back down but never got below 10c / 50f.
Today, a week later I checked the SG and I'm still at 1.024. The yeast is known to work at temps ranging from 10-25c / 50-77f so I don't get it.
Does anyone have any experience with EC-1118 or any ideas to what might have happened? Also, How would I go about restarting it? EC-1118 is a "killer yeast" which I have never used before, but it's supposed to kill other yeast that might be present. So, I'm thinking it could be an issue if I pitch another yeast strain...
What do you think? Thanks in advance!