How to make DIY yeast reactor - The Planted Tank Forum
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post #1 of 28 (permalink) Old 12-14-2010, 02:53 PM Thread Starter
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How to make DIY yeast reactor

anyone wanna point me in the right direction?

Last edited by SgtPeppersLHC; 01-11-2011 at 09:27 PM.
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post #2 of 28 (permalink) Old 12-14-2010, 05:07 PM
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here is a post i made on my set up.

ingredients
- 2 cups sugar
- 1/2 teaspoon yeast
- 3/4 full of water two-liter bottle (warm water, NOT hot)

materials
- one 2 liter bottle
- one 16oz gatorade bottle
- airline
- check valve
- airstone for diffusion (i'm now using an eBay glass/ceramic diffuser)

process:
- mixed up the yeast in a separate cup of water, let sit fo 15 minutes
- added two cups of sugar to the 3/4 full two-liter bottle
- after 15 minutes, added yeast to the two-liter bottle
- gently shook/swooshed the bottle to activate it
- used superglue on the outside of the bottle cap/airline connections to seal

here are some pix and more details on my set up...

reactor: 2L bottle 3/4 filled with warm water, 2 cups of sugar and 1/2 teaspoon dry yeast. it has one tube going from just underneath the cap, into the bubble counter, make sure that tube goes a couple inches past the water in the bubble counter

bubble counter: smaller gatorade bottle, filled 3/4 full with water. this has two tubes in it, one from the reactor, and then the outgoing line that goes into the tank. the outgoing lined should be positioned about 3/4" beneath the cap, this allows the gas to exit and flow up through the check valve and then into the tank. to diffuse it, im using an airstone, i do have an eBay diffuser on the way though.

diffuser: the airstone is placed at the end of the airline and rests just beneath the intake. the gas is released and is sucked into the intake, the bubbles are very small. hopefully my ebay glass diffuser comes this week.

what you cant see in this pic is the "check-valve" that is being used. it is placed on the outgoing (left side) line, it is used to prevent syphoning of water from the tank into the reactor. a bubble counter isn't exactly necessary, but its highly recommended to prevent the gunk/residue that can build up (from the yeast and sugar) flowing into your tank.




i've had great success with my DIY CO2.
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post #3 of 28 (permalink) Old 12-14-2010, 06:22 PM Thread Starter
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nice ty beedee!
I'll make this my project for the weekend.
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post #4 of 28 (permalink) Old 12-14-2010, 06:32 PM
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no prob man. im glad i was able to help. be patient, it will most likely take a few hours before you will see results. let us know how it goes.
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post #5 of 28 (permalink) Old 12-14-2010, 06:33 PM
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This is actualy a 'Yeast Reactor'...

A Co2 reactor is much different. A co2 reactor mixes Co2 gas with water that is currently in, or entering the tank. They basically replace having a diffusor...

Here is an example: http://www.aquaticplantcentral.com/b...2-reactor.html
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post #6 of 28 (permalink) Old 12-14-2010, 06:39 PM Thread Starter
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I dont think I'll be going that in depth yet for co2, its only a 5 gal tank
but I did add it to my bookmarks for later referencing.
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post #7 of 28 (permalink) Old 12-14-2010, 06:41 PM
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Sounds good. I was just posting the answer the the question you asked

I think you meant to ask about a Yeast Reactor
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post #8 of 28 (permalink) Old 12-14-2010, 06:46 PM
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reactor

hear is a picture of mine.
Cost around $7 to make ( not counting used Powerhead )







This one has been only up for a day. CO2 checker is still blue ,
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post #9 of 28 (permalink) Old 12-14-2010, 06:58 PM Thread Starter
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@entocraig
Thanks, you're right I did mean a yeast reactor.

@discus
wow that cheap huh? I just wish I had room for a powerhead in there lol.
any way I could make it small enough for a 5 gal?
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post #10 of 28 (permalink) Old 12-14-2010, 07:11 PM
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Quote:
Originally Posted by SgtPeppersLHC View Post
@entocraig
Thanks, you're right I did mean a yeast reactor.

@discus
wow that cheap huh? I just wish I had room for a powerhead in there lol.
any way I could make it small enough for a 5 gal?
His is also a Co2 reactor not a Yeast Reactor, just a different style.

There are powerheads and mini filters small enough for a 5G. If you get the general idea behind the Co2 reactor styles, you can create your own to fit your tank.

If you are using a canister filter for the 5G you could easily make a small inline reactor.
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post #11 of 28 (permalink) Old 12-15-2010, 05:39 PM Thread Starter
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If I used one of those foam covers for the intake extension thing and cut a hole in it for the airline could I just run the tubing right into the intake?
Also, its just normal tubing right?
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post #12 of 28 (permalink) Old 12-15-2010, 08:28 PM
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Yes, just normal airline tubing from your local pet shop.

As far as running the airline and having it dump into the pre-filter, im sure that would be okay, dont quote me though. lol.

What type of filter are you using?
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post #13 of 28 (permalink) Old 12-15-2010, 11:03 PM Thread Starter
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Its just a little 5 gallon marineland.

Sent from my Droid
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post #14 of 28 (permalink) Old 12-16-2010, 01:53 AM
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I have a related question, why aren't bell defusers more popular? I figure there must be some reason for this.

It seems to me that the easiest way to get CO2 from easily available ingredients is to mix baking soda and vinegar. All the CO2 would be made quickly unlike with yeast so I figure the bell difuser would serve the purpose of releasing the gas over time. But no one does this so I figure there must be a reason.
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post #15 of 28 (permalink) Old 12-16-2010, 03:53 PM
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They just aren't as effective and will eventually full up with Co2 and bubble under the sides..
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