DIY CO2 over done??? - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 01-30-2015, 02:39 AM Thread Starter
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DIY CO2 over done???

Mixed a 3 liter bottle of DIY.
2 cups sugar, 1tsp baking soda, 1.25tsp dry yeast.
Activated yeast with 78 degree tank water.
Mixed all together and instant CO2?
This occurred 5 days ago mind you.

Using a needle valve fed to a DIY CO2 reactor.
CO2 has constantly been climbing and guppies are gasping for air.
Almost @ 60ppm of CO2 in a 40 gallon long.
Using the charts or the math they show the same.
3 liter bottle seems ready to bust using needle valve as restriction.
I have to gas the bottle off by opening to atmosphere occasionally.

Is this really possible with DIY CO2???
I have acquired a CO2 tank with regulators and ready to swap out.
I acquired materials thinking DIY would be minimal production.
KH of 8 and pH of 6.6 ppm of CO2 59.something.

Does this sound right???
New to CO2 in a planted tank.


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Growing is not that difficult.
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post #2 of 11 (permalink) Old 01-30-2015, 04:55 AM
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I suppose it is possible to cause stress to your fish with DIY CO2, particularly if you are injecting a lot of CO2.

Most people do not use more than a 1/3 of a teaspoon of yeast. You have essentially used 3-4x the normal amount, causing a large amount of CO2 to be produced very quickly.

Anthony


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post #3 of 11 (permalink) Old 01-30-2015, 05:11 AM
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Wow that's a lot of yeast! What you're most likely going to have is a very high production rate that only last for a few days before drastically reducing.

When I was doing 3 liter bottles, I'd use 2.5 cups sugar, 1/2 tsp of yeast (very slightly heaped), and 1 tsb baking soda. The mixture would run steady for two weeks before starting a slow decline. I played around with different amounts of yeast/sugar. The most yeast I ever used was 3/4 tsp. That produced almost double the output but fell off greatly after 4-5 days.

Holy crap 1.25 tsp


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post #4 of 11 (permalink) Old 01-30-2015, 01:04 PM
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Question burr240 what ratio would be best if I were to use 1.36 liter bottle, it's a V8 juice bottle?
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post #5 of 11 (permalink) Old 01-30-2015, 01:06 PM
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What burr said is spot on. The high output is brief while the alcohol content will also rise just as fast and bring the yeast production to a halt.
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post #6 of 11 (permalink) Old 01-30-2015, 01:11 PM
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It'll stink bad if that sucker pops lol.
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post #7 of 11 (permalink) Old 01-30-2015, 01:36 PM
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Originally Posted by quiquik View Post
Question burr240 what ratio would be best if I were to use 1.36 liter bottle, it's a V8 juice bottle?
Not sure, the smallest thing I've ever used is 1.89 liter Juicy juice bottles. Have two going now on a 20 gal, as a matter of fact. I do 2 cups sugar, barely 1/2 tsp yeast, and 1 tsp baking soda.

For that size I'd probably start with something like 1.5 cups sugar and 1/3 tsp yeast, or maybe 1/4. But that's just a guess. You'll probably have to play around with it and see what works best. The idea is to get a steady rate for as long as possible. One bubble per second for a couple of weeks straight is better than three for a few days, then two, then one. It's good to have a gas separator/bubble counter bottle so you can keep an eye on the bubble rate. As soon as production slows down it's time to make a new batch.


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Last edited by burr740; 01-30-2015 at 01:54 PM. Reason: .
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post #8 of 11 (permalink) Old 01-30-2015, 08:13 PM
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Quote:
Originally Posted by burr740 View Post
Not sure, the smallest thing I've ever used is 1.89 liter Juicy juice bottles. Have two going now on a 20 gal, as a matter of fact. I do 2 cups sugar, barely 1/2 tsp yeast, and 1 tsp baking soda.

For that size I'd probably start with something like 1.5 cups sugar and 1/3 tsp yeast, or maybe 1/4. But that's just a guess. You'll probably have to play around with it and see what works best. The idea is to get a steady rate for as long as possible. One bubble per second for a couple of weeks straight is better than three for a few days, then two, then one. It's good to have a gas separator/bubble counter bottle so you can keep an eye on the bubble rate. As soon as production slows down it's time to make a new batch.
Got it thank you very much, I'm going start redoing my 50 gal fairly soon so I want to get all my fish in a row so to speak. Oh do you use co2 resistant tubing also?
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post #9 of 11 (permalink) Old 01-30-2015, 09:40 PM
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Got it thank you very much, I'm going start redoing my 50 gal fairly soon so I want to get all my fish in a row so to speak. Oh do you use co2 resistant tubing also?
I just use silicone tubing. I like that it's soft and flexible, I like being able to see through it, plus I think the blue looks cool.


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post #10 of 11 (permalink) Old 01-30-2015, 10:50 PM
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I just use silicone tubing. I like that it's soft and flexible, I like being able to see through it, plus I think the blue looks cool.
Thanks again, the reason I asked is I've read that certain kinds of tubing become brittle or co2 is lost through some tubing.
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post #11 of 11 (permalink) Old 01-31-2015, 04:10 AM
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I have tried several types of tubing, and they all got harder the longer they were in use. The silicone tubing I liked best because it seemed to not get as hard as the others. The CO2 resistant tubes didn't get much harder, but were so hard to start with it was hard to install it.

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