CO2 systems - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 11-01-2011, 11:57 PM Thread Starter
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CO2 systems

I plan on actually buying a CO2 system soon but for now i got a 2qt (1.89l) bottle what are the best ingredients to use and i really dont want to use baking soda either.
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post #2 of 9 (permalink) Old 11-01-2011, 11:58 PM
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It's just yeast and sugar. baking soda helps keep it more stable.
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post #3 of 9 (permalink) Old 11-02-2011, 12:01 AM Thread Starter
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i know how much sugar to use but how much yeast do i use? and i got a 40 gallon how many co2 generators should i have
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post #4 of 9 (permalink) Old 11-02-2011, 12:22 AM
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I had this stored away for when I start another tank, as I can only afford only pressurized system...
2 cups sugar
1/4-1/2 teaspoon yeast.
Fill a 2L pop bottle about 3/4 full

No idea where I found it or what that was recommended for but it would probably be a good starting point

Matt


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post #5 of 9 (permalink) Old 11-02-2011, 12:43 AM
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Quote:
Originally Posted by jmrmotorhead View Post
I had this stored away for when I start another tank, as I can only afford only pressurized system...
2 cups sugar
1/4-1/2 teaspoon yeast.
Fill a 2L pop bottle about 3/4 full

No idea where I found it or what that was recommended for but it would probably be a good starting point

Matt
This recipe worked for me. Any amount of yeast will do, just understand that the yeast is essentially eating the sugar. So, if you put a full teaspoon of yeast the reaction will be stronger, but short lived (maybe a week). If you put a half teaspoon the reaction will not be as potent, but it will last longer (maybe two weeks).

Also, when all the ingredients are in the 2 liter it should be 3/4 full as stated. This is important as the "stuff" will expand. Don't overfill!
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post #6 of 9 (permalink) Old 11-02-2011, 01:00 AM
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hmmm maybe thats why my co2 runs out so quick.. my recipe for a 1.25 litre bottle

2 cups sugar (white, raw or brown or a mix)
2 teaspoons of yeats
1/2 teaspoon of bicarb

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post #7 of 9 (permalink) Old 11-02-2011, 01:26 AM
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Yea...might try it with less yeast. Here's the deal though, if you use 1, 1/2, or 1/4 teaspoon of yeast, the reaction takes longer to get going and build up enough pressure to push the Co2 out underwater in your tank. I think a lot of people think it's not working after a couple hours and add more yeast.

It's not uncommon for a slow burn DIY Co2 to take 4-8, even 12 hours to really get going. But those are the ones that will last 2-3 weeks on one mix.

I've also read of people putting 5-10 ml of molasses in the mix. I've heard it will drag out the process.
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post #8 of 9 (permalink) Old 11-02-2011, 11:29 PM Thread Starter
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i know this has nothing to do with the co2 but i got this brown algae on two of my plants does anybody have any suggestions on how to get it to go away or is there something wrong with my ph because ive just noticed it and ive had my tank for a little over a year and this is the first time seeing it
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post #9 of 9 (permalink) Old 11-22-2011, 04:06 AM
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