Problems with DIY CO2 - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 02-21-2012, 10:18 PM Thread Starter
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Unhappy Problems with DIY CO2

OK so im using a 2 liter bottle, with a bubble counter, check valve and an airstone. I'm not sure what's going on, it might be because my bottles aren't air tight because they're just taped, or my yeast, or my overall structure of the CO2 reactor. The bottles seem air tight because i taped the inside and out and even tested it out. The yeast that i bought may not be fresh because when i tried to activate it in another container it didn't even activate. It just sunk to the bottom with the water on top, it didn't foam or anything like that. It seems like my tubing structure may be a bit long but would that affect it?? But the most likely problem is that the yeast is not activating.

I do 2 cups sugar(not sure if it matters or not but mine is cane sugar), 1/4 tsp yeast, 1/2 tsp baking soda. First i fill up the bottle 3/4 with lukewarm water then i add the sugar, i then shake it for it to dissolve. Then after i tried activating the yeast for like 20 min. i just threw it in my bottle to see if it would work, then i added 1/2 tsp of baking soda. Waited around 20 hrs or so and nothing. No bubbles in my counter, no foam in my 2 liter.

If anyone has an answer, please tell me. Thank you and sorry for making this so long
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post #2 of 9 (permalink) Old 02-21-2012, 10:26 PM
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What are you doing to "activate" the yeast? I don't think tape will seal a tube to a bottle cap, can you post a picture of your set up?

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post #3 of 9 (permalink) Old 02-21-2012, 10:44 PM Thread Starter
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Here's some pics may be bad pics tho. Im not sure how to activate it exactly but from what i saw from youtube videos, i use a small container w/a little bit of warm water and i put in 1/4 teaspoon of yeast and i mix it. On youtube it said the yeast activates when it starts to foam or form small clumps. I did it and they said it should form clumps within 5 min or so but i waited for almost half an hour and nothing happens, the yeast disperses and sinks to the bottom only. I'd like some suggestions please.
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post #4 of 9 (permalink) Old 02-21-2012, 11:13 PM
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when activating add a small amout of sugar, like a tablespoon, with your warm water and yeast.
if nothing happens after about 15 mins your yeast is probably dead.
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post #5 of 9 (permalink) Old 02-21-2012, 11:16 PM Thread Starter
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ok yeah thanks, im actually trying that right now. If it's not the yeast then it's most likely that i need to air-tighten the caps.
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post #6 of 9 (permalink) Old 02-21-2012, 11:36 PM
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It's more than likely the caps. I teflon tape the threads of mine.
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post #7 of 9 (permalink) Old 02-22-2012, 12:01 AM Thread Starter
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I see..ok i'll try out different methods then.
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post #8 of 9 (permalink) Old 02-22-2012, 01:26 AM
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We taped ours at first but they just kept leaking because the hubby drilled the holes larger than the tube. We ended up siliconing it and the system works fine now. I made a batch just tonight and it was bubbling within an hour.


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post #9 of 9 (permalink) Old 02-22-2012, 04:44 AM Thread Starter
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For some reason my yeast never proofs, so i might buy new yeast. I just made new holes for the caps and now i just need to buy silicone at the local pet store. Being anxious right now, my plants are growing new shoots and roots but the plant leaves are browning. I don't know if the algae affected it or it needs more co2 or both. I'm going to need a full tank clean out :/
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