CO2 DIY question for beginner - The Planted Tank Forum
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post #1 of 8 (permalink) Old 11-12-2004, 08:00 AM Thread Starter
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CO2 DIY question for beginner

Hi all... I'm new here

I have some sort of question, I hope you don't mind...

I'm willing to create CO2 DIY but how to dissolve it in water if I only want to use airstone?

just simply plug the airstone to the bottle????

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post #2 of 8 (permalink) Old 11-12-2004, 10:43 AM
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Hello mistique and welcome to the forum

There are many ways to diffuse the CO2 for your tank and the airstone is probably the worst. The size of the tank and your water's KH/PH determine what is needed. DIY CO2 usually only works in tanks up to 30, maybe 40 gallons. Most folks use "Ramps" with which the bubble rides up and slowly dissipates into the water.
The whole idea of diffusion is to have constant contact between CO2 and water, with an airstone it just bubbles up to the surface briefly giving very little time to dissipate and poor results.

How big is your tank ?
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post #3 of 8 (permalink) Old 11-12-2004, 12:17 PM
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also i don't know if you realize it put the DIY co2 bottles are not in the tank... and you use tubign to carry the gas in to the tank to some type of diffuser
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post #4 of 8 (permalink) Old 11-12-2004, 12:18 PM
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The problem with an airstone on a DIY CO2 system is that they can clog and can cause the bottle to burst.
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post #5 of 8 (permalink) Old 11-13-2004, 01:55 AM
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well my DIY CO2 still underconstruction..just need the glue to dry...but i stuck the airstone in a small 12oz coke bottle and place it inside the tank, near the canister intake. also i cut both side panel of the small 12oz coke bottle so the the canister can suck the bubble in, if not the bubble can flow on top portion of the bottle...that way it can easily dissolve. i'm not good at describing. hopefully you understand.
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post #6 of 8 (permalink) Old 11-14-2004, 06:07 AM Thread Starter
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my tank is 100*40*40(cm)

I'm just planning to set it up....
I just don't get it....
If I use submersible pump. how to plug the co2 on it?
it is on the small input?if it so.. how do i know that my CO2 is working?

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post #7 of 8 (permalink) Old 12-08-2004, 08:00 PM
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What I've done is this

1. Got an old betta/fish food plastic canister.
2. Drilled 2 holes on top and lots of little holes on the to bottom
3. Stuck 2 tubes on top 1 is for incoming co2 from 2 liter mixture and the other goes to a tube connected to a regular submersible water fountain pump that comes with those table waterfalls etc. (you can probably find it at a thrift store!)
4. Put some pea size gravel in the container to break up the incoming water and allow more surface area to break up co2.
5. stuck it in the corner and get pretty much 100% absorption.

The rocks provide more opportunity for the co2 and water to mix. The pump is fairly small enough so it doesn't take away too much from the aquarium. But basically the gas goes in and nothing but water comes out of the bottom without any gas leaks.. 100% absorption! if you need pictures, i can get it for you...just email me! I'm a newb but getting the hang of things here...
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post #8 of 8 (permalink) Old 12-08-2004, 09:36 PM
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CO2 will also dissolve cheap airstones.
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