Comparison of Different Yeasts - The Planted Tank Forum
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post #1 of 52 (permalink) Old 12-20-2004, 06:20 PM Thread Starter
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Comparison of Different Yeasts

To compare yeasts in a controlled manner, I set up 5 bottles and tried to make the conditions the same for each bottle:



So now, I'm just going to count bubble rates for the next couple of weeks; I'll keep posting the results.

Yeasts used are: Lalvin EC-118, Lalvin D-47, Red Star Premium Cuve, Red Star Pasteurized Champagne, and Fleischmann's. The table below shows the rate of production in bubbles-per-minute after two days:

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post #2 of 52 (permalink) Old 12-20-2004, 06:39 PM
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/grabs popcorn, pulls up chair, presses "subscribe" button

All ears here. Great idea.

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post #3 of 52 (permalink) Old 12-20-2004, 07:03 PM
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Oooh, pass the popcorn...

What recipe are you using for this? I'm curious because I always just use regular Fleischmann's bread yeast and I get about 12bpm (approx. 1 bubble every 5 seconds). BTW, totally cool bottles you're using. Where are they from?


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post #4 of 52 (permalink) Old 12-20-2004, 07:38 PM Thread Starter
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Thanks for showing interest. The bottles are cheap knockoffs of those fancy Lexan or "Nalgene" water bottles the hikers use - WalMart, $4 ea. The recipe is 1 cup sugar and 1/4 tsp yeast.

Amanda, I have never been able to get a good bubble rate, I suspect it's my tap water. After this test, I'm going to try R/O or spring water.

Has anyone seen Tarah Nyberg's yeast recipe? Tarah Nyberg's Yeast Recipe I'm hoping this might be the answer to my problems.
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post #5 of 52 (permalink) Old 12-20-2004, 07:45 PM
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I've got ridiculously soft water (0 straight out of the tap), so I also add 1 tsp baking soda to the mix.


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post #6 of 52 (permalink) Old 12-20-2004, 07:55 PM Thread Starter
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Quote:
Originally Posted by amanda huggenkiss
I've got ridiculously soft water (0 straight out of the tap)...
Thanks, for the info, that helps alot.
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post #7 of 52 (permalink) Old 12-21-2004, 03:26 AM
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I'll have to send you some lager yeast to help continue the experiment, Karl!

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post #8 of 52 (permalink) Old 12-21-2004, 04:55 AM
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This is a good experiment.
I use Fleischmann's bread yeast myself since it was easy to get. Where did you get the other yeasts?

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post #9 of 52 (permalink) Old 12-21-2004, 03:17 PM Thread Starter
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Thanks, Mike, you can just mail 1/4 tsp in a regular envelope. I bought the yeast at Mountain Home Brew (www.mountainhomebrew.com - click on "Wine Making").
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post #10 of 52 (permalink) Old 12-21-2004, 03:21 PM
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Great Idea! I'm a bit confussed by Tanya's recipe though. How much yeast was she using? I mixed 1/2 tsp with 2 cups of sugar in a large pop bottle which according to her is not to good. So am I to keep that mix in the bottom and then add baking soda and protein mix till the mix is balanced or in a ratio that is the same as her recipe? She just says to leave previous mixture in the bottom of the bottle but the only mixture she mentioned was 2 cups of sugar and 2 L of H20. What mixtures are you folks using?

P.S. This is for a 20 and 10 gal tank.
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post #11 of 52 (permalink) Old 12-21-2004, 03:28 PM Thread Starter
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Quote:
Originally Posted by motoman
...What mixtures are you folks using?...
...and, forgive me, I'm not hip to the latest dietary fads, but what exactly is "protein drink" and can anyone recommend a brand? (for yeast, that is, not for me )

Last edited by ksand; 12-21-2004 at 03:30 PM. Reason: Fix
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post #12 of 52 (permalink) Old 12-21-2004, 04:51 PM
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BTW... I don't mean to hijack but what what temperature is better for DIY CO2 making?

I noticed that my DIY CO2 lasts longer during winter time?

What's the relation between temperature & yeast life?

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post #13 of 52 (permalink) Old 12-21-2004, 05:04 PM
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If you're using bread yeast, it can be a profound difference. In the winter when the house temp is low, I have to put my bottle in a bucket with a small aquarium heater hooked to the light timer. Otherwise, I get about a bubble a minute or two. Oh, it lasts for weeks on end, but the output is negligible.

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post #14 of 52 (permalink) Old 12-21-2004, 05:26 PM
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Protein Drink mix can be found at any fitness supplement store and some grocery stores in the pharmacy/health food section. Its a powder that you mix with water, juice or milk. Contains a bunch of protein and other nutrients. It's similar to a meal replacement shake such as Ensure, Slim fast ... that type of thing.

I still am not sure how much yeast you are supposed to add to the "recipe"? I'm seeing the protein, sugar, water and baking soda amounts but no yeast measurement. Any ideas?
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post #15 of 52 (permalink) Old 12-22-2004, 02:52 PM Thread Starter
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Quote:
Originally Posted by motoman
but no yeast measurement. Any ideas?
No, I guess you have to experiment until you get the right amount. Thanks for the info on the protein drink.
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