A brewers thoughts on diy co2 - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 12-08-2015, 05:24 PM Thread Starter
drx
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A brewers thoughts on diy co2

i know any yeast is the general idea of these. but i don't under stand why people don't take lessons from brewers. Use a yeast that can handle higher abv .turbo yeast has the highest at 20% thats a lot of sugar eating potential. about 10 Oz of white sugar to a 2 litter then combine that with yeast washing so you almost never need to by yeast. Since white sugar is hard for yeast to eat i would also add some yeast nutrients in. On the other side you could use a better tasting sugar source like apple juice and brew your self some cider while giving your tank co2. Again seems a lot more efficient then the guides I've read.
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post #2 of 7 (permalink) Old 12-08-2015, 05:42 PM
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Well try it and see.

The biggest challenge with diy is consistency - maintaining a steady rate from one day to the next is very important. It's not so much about how long a mixture will last, it's how long can you get it to run at a consistent rate.


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post #3 of 7 (permalink) Old 12-08-2015, 06:28 PM Thread Starter
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i just might i have a 10g thats empty and been getting an itch to fill it.(dang mts ) any yeast will have a ramp up( as they reproduce) and a ramp down(as the majority of sugar is eaten) using more sugar results in a longer duration but might also end yup with a greater volume of co2 being produced in the middle as theres more room for them to grow.
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post #4 of 7 (permalink) Old 12-08-2015, 06:48 PM
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Ramp up/downs are why it's best to use multiple bottles with staggered start/change times. For example 2 reactor bottles changing out one per week.

Ideally you want the same bubble rate all the time. What you DO NOT want is 2 bps for a few days, then 3, then 4...then back down to 2 again for a week, etc. It will be an algae nightmare, specifically bba.


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post #5 of 7 (permalink) Old 12-08-2015, 07:51 PM
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Another issue I can think of using brewers yeast, or turbo yeast, is that they produce an inordinate amount of krausen due to their speedy/greedy sugar munching.
If you do not have the head space you are going have a nasty blow out if you don't use a secondary vessel to catch it. It is also means that you are going to have very inconsistent CO2 delivery over the course of 5 days as burr740 mentions.
Bread yeast is good in that it is slow and pretty consistent over time and you can get a pretty decent ABV with it. I've done several meads (JAOM) with bread yeast which is about 10-12%.
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post #6 of 7 (permalink) Old 12-10-2015, 04:18 PM
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Brewers yeast is also a lot more expensive than a jar of yeast from walmart.
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post #7 of 7 (permalink) Old 12-10-2015, 04:37 PM
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check out this thread... has a good system worked out for DIY wine/CO2 with the rotation method... If I recall correctly they use 5 bottles and add/remove one every 3rd day or something like that to always have a constant supply of CO2 based on the ramp up/ramp down timing...

https://www.plantedtank.net/forums/20...byproduct.html

--Rob--

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