Diy "controlled" yeast Co2 output. - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 11-03-2006, 04:42 PM Thread Starter
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Diy "controlled" yeast Co2 output.

First let me give some info on how i came up with this.
OK i setup your standard diy yeast Co2 setup that i use all the time. I even have 2 x 2liters on my 10 gallon that is up on top of a book/display case that is running great and my pH is at 6.4 in this tank. So i decide to go a head and setup 2x2 liter bottles for my 29 gallon and i did it just like i did the ones for my 10 gallon. But i got like 1 set of bubbles each time the bubbles came out at about 20-40 or even 50 seconds. Not good i thought so i added 2 more bottles and still the same results. So i took this hole setup up stairs to my bath room and filled my tub with warm water then stuck the hole setup with every thing stilled connected in the tub. With in a minute or two bubbles at a steady rate of about 1 set per second. So i placed my finger over the outlet to let the pressure build up so i could check for leaks which there were was not. So it came to me the only difference between the 2 setups were there height in the house and that there height was effecting. Well not the height directly but the temperature at the two different heights. One on the 10 gallon being very warm due to the fact the heat rises and down under the tank stand near the floor which is very cold. So cold in fact my feet loose felling from being so cold.

OK now the setup.

5 gallon bucket
submersible water heater
Air pump

First place the coke bottles in the bucket ( i have 4 bottles) then install the water heater. Then fill with warm water at about 90 degrees F. I have the watter filled just above the water yeast mixture in the water. The bottles will float around a bit but don't worry because the is not nearly enough room for them to lay flat in this bucket even if it was just one bottle. Next place the air line that is connected to the air pump so the air is bubbling up the side or right from under the water heater so as not to make a hot spot in the bucket.

Now the controlled part come with the help of the heater. If i want a higher Co2 ppm going into the tank then i just raise the temp on the heater and if i want a lower Co2 ppm i just trun down the heater. Not bad bad right.

Here is a pic of the setup.



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Last edited by will5; 11-03-2006 at 07:02 PM.
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post #2 of 11 (permalink) Old 11-03-2006, 05:19 PM
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Sounds good. The yeast will be actively reproducting at the elevated temperature, and dormant, or at least less active at a lower temp. Be careful not to elevate the temperature too much as the yeast will die. Not sure what exact temp. is but someone else I'm sure will post that info if you don't already know.

Neat idea. Post more results as you get them.


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post #3 of 11 (permalink) Old 11-03-2006, 06:09 PM
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Sounds cool... it is simmilar to what I did to keep my brine shrimp warmed in a very cold house.

You could even put the heater on a timer maybe and that way slow down your reaction at night when you don't need to pump in the CO2, but it may be awfully hard on the heater to keep having to warm from very cold each morning.

Something so expensive and addictive HAS to be illegal. I'm just waiting for the police to break down my door and confinscate my fish food.
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post #4 of 11 (permalink) Old 11-03-2006, 06:51 PM
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great idea!!


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post #5 of 11 (permalink) Old 11-03-2006, 07:01 PM Thread Starter
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Hi

Hi i will continue to play with the temperature until i get it just right and i will keep this thread up to date as i try different temps.


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post #6 of 11 (permalink) Old 11-03-2006, 07:08 PM
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I'm sure there's a million variables, but maybe you can nail down something concrete...BBS vs. Temp...etc.


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post #7 of 11 (permalink) Old 11-03-2006, 08:18 PM Thread Starter
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Hi

First round

Time 2:14 pm central time. 11/3/06
pH6.8
KH 8d
Co2 38ppm
Temp 82 f
5 bpm = 1 set bubbles every 12 seconds ( bubbles always come out in groups of 3-5 each time it bubbles)


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Last edited by will5; 11-03-2006 at 08:20 PM. Reason: forgot to add something
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post #8 of 11 (permalink) Old 11-04-2006, 06:08 AM
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Nice idea.
Maybe try a timer on the heater? Have it shut off about an hr. before lights shut off and an hr before they turn on?
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post #9 of 11 (permalink) Old 11-04-2006, 08:17 AM
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Good Work, but sadly its just reinventing the wheel.....Here's something that I played with briefly about 6 months ago:

controlled-diy-c02-56k-warning

A number of others already use the bucket, water, heater setup, but I haven't seen it mentioned in a while.....

Good Job Though.....


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post #10 of 11 (permalink) Old 11-04-2006, 01:48 PM Thread Starter
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Hi

I thought i had read about it before but i really was not sure. OK so credit goes to you for the first design. But this way is way cheaper and more simple.


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post #11 of 11 (permalink) Old 11-04-2006, 11:13 PM
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Hi will5,

Mine is not the first design, nor am I looking for any kind of "Credit". I was just playing with an idea that already existed and a gadget that I already had--that's all. Some others have said that they can gain some control over their DIY C02 buy just running the heater on a timer with their lights. Apparently it gets cool enough in their place that the "Night Time Drop" cools things enough to slow down the yeast, hence the C02 production. Lights come on--heater too, things warm up, C02 production increases. I already had the Iceprobe collecting dust from a previous project, so I played with it. Sold the Iceprobe and went pressurized, but I still use DIY C02 on several other setups.



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