Improving on the yeast bottle - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 02-08-2012, 02:22 AM Thread Starter
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Improving on the yeast bottle

Hi all,

I want to share two things. One is a tested idea that I have used with great success, one is a new (to me) idea.

Cranberries contain a chemical which interferes with yeast and slows down their metabolism. This is one reason why cranberry wine is not a thing. Careful addition of cranberry juice to a yeast bottle will slow down the fermentation and make a bottle last longer (while producing less of course). I do half a tablespoon of cranberry juice (obviously, it has to be real cranberry juice) per liter of sugar mix. It doubles my run-time while providing acceptable CO2 levels from one bottle for a small tank (less than 10 gallons).

The other idea is a way of getting a long, stable run time from yeast bottles. If the sugar solution was dripped into an active culture, there would be no boom and bust like when you start the mix with 100% of the sugar available right away. In addition you could possibly stop adding the sugar at night to greatly improve runtime. However actually achieving this aside from daily manual squirts of sugar might be a challenge.
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post #2 of 6 (permalink) Old 02-08-2012, 04:40 AM
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The drip sugar idea sounds like a good. However, others may see it as too much work. I've seen something like this done before at a lab. You drill a hole on the top part of the bottle, not the lid, then insert a syringe in it. It has to have an air tight seal while being removable for refill. Sorry if my description doesn't make sense.

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post #3 of 6 (permalink) Old 02-08-2012, 10:47 AM
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Instead of dripping the sugar, I take jello and double the sugar and then pour that in the bottle. Then the yeast can't get all the sugar at once.

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post #4 of 6 (permalink) Old 02-08-2012, 12:20 PM Thread Starter
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Quote:
Originally Posted by PinoyBoy View Post
The drip sugar idea sounds like a good. However, others may see it as too much work. I've seen something like this done before at a lab. You drill a hole on the top part of the bottle, not the lid, then insert a syringe in it. It has to have an air tight seal while being removable for refill. Sorry if my description doesn't make sense.
Yeah you would almost need to pump the sugar through a check valve to make it work. But I think that a truly controllable yeast system would be really fun too have.
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post #5 of 6 (permalink) Old 02-08-2012, 12:52 PM
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Quote:
Originally Posted by fauxjargon View Post
HThe other idea is a way of getting a long, stable run time from yeast bottles. If the sugar solution was dripped into an active culture, there would be no boom and bust like when you start the mix with 100% of the sugar available right away. In addition you could possibly stop adding the sugar at night to greatly improve runtime. However actually achieving this aside from daily manual squirts of sugar might be a challenge.
Jell-O method.
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post #6 of 6 (permalink) Old 02-08-2012, 03:15 PM
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So you just take a pack of jello and mix that with the regular mixture of hot water, yeast and sugar?

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