DIY CO2, 20 hours later, no bubbles - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 07-05-2005, 07:52 PM Thread Starter
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DIY CO2, 20 hours later, no bubbles

My DIY CO2 reactor isn't working. I followed the directions, 1 tsp yeast, luke warm water, 2 cups sugar, but still no bubbles (almost 20 hours running).

I was thinking, another 1/2 cup of sugar.....

Any thoughts?

thanks
dave
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post #2 of 6 (permalink) Old 07-05-2005, 07:55 PM
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You might have a leak in your plumbing. I have heard of brew not working at all, but i have never seen it. If you are absolutely sure you dont have a leak, dump the brew and make more. Its cheap!! HEHE
jB
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post #3 of 6 (permalink) Old 07-05-2005, 08:25 PM
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Maybe the yeast went bad. You should always proof it! Or your water was to hot and killed the yeast.

Jeff B
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post #4 of 6 (permalink) Old 07-05-2005, 08:34 PM Thread Starter
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Smile

This is my second batch. I even went and bought some new yeast. What do you mean when you say "proof it"?

Water was luke warm...........

I believe that the plumbing is good. When I give the bottle a gentle squeeze, I can see it push the water.

Any other thoughts? I appreciate them all.
sincerely
Dave
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post #5 of 6 (permalink) Old 07-05-2005, 09:55 PM
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leaks, baking soda

You first need to be certain that you have no leaks, if there is some gas in the line, but not enough to push down into the tank, then the pressure must be escaping. Every connection is a potential leak.

Aquarium silicone is good in compression but not in tension, so don't count on it to hold an external connection. I like Liquid Nails (a clear caulk type glue from the hardware store, caulk dept) and I've used it even on a unit that was in production and actively leaking and had it hold under pressure when applied to the outside of a cap connection.

Then, more sugar is not better, the sugar can get too high and actually retard the yeast, IME. The water vs sugar ratio is important, that 2 cup sugar is typically with nearly 2 liters of water. For a smaller bottle, less than 2 liter, reduce the sugar accordingly.

Last, I add a teaspoon of baking soda. In tests I conducted using similar bottles, the one with the bakins soda was much better, producing more and longer. If you use bread yeast, it does not tolerate the acidic condition that develops in the bottle, the baking soda gives it an alkaline starting point.

Oh, also, water needs to be not at all hot, just about skin temp is fine.

To proof the yeast, add the yeast to a cup of lukewarm water wiht a pinch of sugar. Let the yeast fall then rise again, look for a tiny bit of foam around the rim of the cup. That means it is good and you have given the yeast a chance to wake up and rehydrate before you plunge it into the sugar solution.
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post #6 of 6 (permalink) Old 07-06-2005, 11:40 AM Thread Starter
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Yeah, problem solved

I thought my plumbing was good, but it wasn't. I double checked everything, except the gang valve. I put some teflon tape around the valves and problem solved.

When revelation hit!..........."You first need to be certain that you have no leaks, if there is some gas in the line, but not enough to push down into the tank, then the pressure must be escaping. Every connection is a potential leak."

Thanks to everyone for your thoughts and suggestions.

sincerely
dave
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