Another DIY Co2 setup - The Planted Tank Forum
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post #1 of 17 (permalink) Old 08-06-2006, 12:24 AM Thread Starter
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Another DIY Co2 setup

Thinking about getting a DIY CO2 setup for my tank this weekend..

My tank is a 20 gallon long. So it is about 30 inches long, 12 inches high, and around 10 inches wide..

This is the formula I am planning on using.

1 1/3 cups of sugar
1/2 teaspoon of yeast
warm water up to the curve of a 2 litre bottle

My questions.

I have heard many methods of diffusing the CO2 into the tank. Which method is the easiest and best? I was thinking of using the method where I just stick the airline tubing into the intake of my filter.

Or would it be better to use an airstone?

Or another method??
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post #2 of 17 (permalink) Old 08-06-2006, 12:29 AM
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I wouldnt recommend a regular airstone. I use small glass diffusors in my tanks with DIY CO2.

Make sure you install a check valve somewhere between the bottle and the diffusor. stops backflow when you change the bottle.

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post #3 of 17 (permalink) Old 08-06-2006, 12:34 AM
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I've had best results using an in tank reactor. You just get a little powerhead and hook it up to ~6'' plastic tube and stuff some coarse sponge material in the end of the tube. You feed the CO2 line into the powerhead, the powerhead chops up the bubbles and shots them into the tube to diffuse...


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post #4 of 17 (permalink) Old 08-06-2006, 01:10 AM
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Do you have a picture of that steve?
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post #5 of 17 (permalink) Old 08-06-2006, 05:37 AM
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on my 20L im gonna use the Nutrafin co2 system, but im gonna go with the DIY mixture

20 Gal. JBJ 2x65watts CF, ADA Aquasoil, JBJ Pressurized Co2, Rhinox 3000 and Aquaclear 50 (Current Tank)
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20L 65watts CF , 100 % Eco-Complete, JBJ Pressurized co2 w/ Rhinox 1000 and Fluval 203 (RETIRED)
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post #6 of 17 (permalink) Old 08-06-2006, 04:54 PM
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I highly recommend the glass diffusers previously mentioned. A cool stream of bubbles and you have a visible sign when the co2 bottle needs a refresh. (yes, i know you can use a bubble bottle, mine is under the tank)

I have purchased several from this seller, he is extremely reliable!

http://stores.ebay.com/AquaticMagic-Inc-International
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post #7 of 17 (permalink) Old 08-06-2006, 05:54 PM Thread Starter
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Hmm, well seeing how small my tank is, I don't think it would be a good idea to get a powerhead in addition to my HOB filter which is rated for a 40 gallon tank. That way I dont have too much surface agitation.

Does the method of sticking the airline tube from the bottle into the filter intake to allow the filter impeller to chop it up work well?

If not I will just get a regular glass diffuser like mentioned.

I dont want a whole CO2 system right now because I have a small budget at the moment until my job picks back up. That is why I want to do a DIY CO2 setup.
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post #8 of 17 (permalink) Old 08-06-2006, 06:11 PM
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If you decide on a glass diffuser, get the mini. I have 2 in my tank, and they are really small and effective.
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post #9 of 17 (permalink) Old 08-06-2006, 06:17 PM Thread Starter
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Ok I will do that. Is there a certain retailer I can look for them at that are good? I would rather do it outside the net so I can get it setup faster.
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post #10 of 17 (permalink) Old 08-06-2006, 07:02 PM
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i dont know of any local resources, i had to ebay mine.
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post #11 of 17 (permalink) Old 08-06-2006, 08:10 PM
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I have two nano glass diffusors in my 125 the are great

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post #12 of 17 (permalink) Old 08-06-2006, 10:16 PM
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Quote:
Originally Posted by mr.gaboozlebag
Do you have a picture of that ?
I think this is what Toofazt was talking about.......if not, this is what I used when I got into planted tanks..
https://www.plantedtank.net/articles/DIY-CO2-Reactor/2/


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Last edited by aquamoon; 10-06-2006 at 01:47 AM.
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post #13 of 17 (permalink) Old 08-07-2006, 01:07 AM
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Quote:
Originally Posted by toofazt
I've had best results using an in tank reactor. You just get a little powerhead and hook it up to ~6'' plastic tube and stuff some coarse sponge material in the end of the tube. You feed the CO2 line into the powerhead, the powerhead chops up the bubbles and shots them into the tube to diffuse...
This is a shot of my DIY diffusor. Similar theory except I've modified the powerhead to take the co2 tubing into the inflow and get the gas munched up into even smaller bubbles. That's in the top right corner (it's a bit hard to see the tubing.

From there it feeds into an old garlic crusher I had lying around. I've drilled one hole in the larger chamber. A small section of airline allows any major buildup of gas to escape. A bit with small holes in seperates the large chamber from the smaller bottom section which has had a number of smaller holes drilled in it to allow the co2 enriched water to escape. I did have a small bit of sponge in between the two chambers, but removed it as it really didn't do much and started to build up with gunk.

This is still running in a 150L (40 Gal) tank, with 2 x 2-litre bottles of SYM (sugar-yeast mixture). It gets me co2 levels of around 22ppm. The powerhead is a Rio 300l/h job (not sure of the model number but they're ultra-cheap usually).

Just an indication of how you can use your imagination. I'm sure using the gravel vac tube method works equally as well. But, in the name of DIY, this is what I had lyting around unused.



(Btw, this is view from the back of my tank - it's an inbuilt)
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post #14 of 17 (permalink) Old 08-07-2006, 01:34 AM Thread Starter
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So basically for a DIY reacter all I need is some kind of cylindar with an airline connected to a powerhead, with foam in the cylindar?

Seems extremley simple.. Should only cost around 10-15 dollars max.. nice!!
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post #15 of 17 (permalink) Old 08-07-2006, 03:29 AM
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Quote:
Originally Posted by Fishboy08
with an airline connected to a powerhead, with foam in the cylindar?
The airline (CO2 line..) feeds from the DIY CO2. You will need a larger sized hose to hook the "cylinder" to the powerhead ( or water pump)

The foam is the one part that I never liked about this reactor plan.
Filterfloss IMO would work just as good.


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