Comprehensive DIY C02 Index - Recipes, reactors, & more - The Planted Tank Forum
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post #1 of 2 (permalink) Old 12-01-2005, 10:11 PM Thread Starter
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Join Date: Jul 2005
Location: USA
Posts: 557
Comprehensive DIY C02 Index - Recipes, reactors, & more

Here's a collection of DIY CO2 articles that include directions
for making various reactors, yeast recipes, and CO2 bottles units.

DIY CO2 References - Understanding the Basics of DIY CO2 diffusion with how to guides

Comprehensive DIY CO2 Report - reasons for CO2, DIY bottles, yeast recipes, and diffusors w/pics
DIY CO2 Article - illustrates how to make DIY CO2 bottles, and yeast recipes w/pics

CO2 Reactors and Diffusors - methods of dissolving and dispersing CO2
Hagen Nutrafin Ladder - one of the best CO2 diffusors
CO2 Diffusion - using the "bell", filter and powerhead intakes, external reactors, glass diffusors

External Reactors - are hooked inline to a canister filter to dissolve CO2 bubbles against water flow
Aquamedic 1000 - Commercial External Reactor
Gomer Reactor - DIY version of Aquamedic 1000 External reactor
Rex Reactor - DIY version of Aquamedic 1000 External reactor
Hoftiezer Reactor - external reactor using clear PVC from
Inline CO2 Reactor - DIY version External Reactor

CO2 Yeast Recipes
Hagen Nutrafin Recipes - yeast recipe to fill Hagen canister unit
Nyberg's Yeast Method - addition of soy powder to enhance CO2 production
Jello Recipe - use of jello to prolong CO2 production
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post #2 of 2 (permalink) Old 07-25-2006, 03:40 AM
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Join Date: Feb 2003
Location: Hawthorne, New Jersey
Posts: 10,125
CO2 bottle pressure in relation to room temperatures

In response to a question about the internal pressure in a CO2 bottle at a given room temperature, one of our members, MADMAN280 posted this useful information:

Originally Posted by madman280
When a CO2 tank is reasonably full it will contain a mixture
of both CO2 liquid and vapor.

As long as both liquid and vapor are present,
the pressure in the (CO2) tank will depend only on the (ambient) room temperature (not "fullness")
as shown in the table below:

Tank Temperature Cylinder Pressure
(F) (PSIA)
@69 837
@71 859
@75 905
@77 928
@79 952
@81 976
@89 1080

The gauge pressure (PSIG) is approximately 14.7 psi less than the values in the table above. The temperature to pressure relationship is logarithmic. Thats why its not a good idea to leave a full cylinder in your trunk on a hot day.
Thanks MADMAN280!!


Last edited by sewingalot; 05-16-2011 at 06:10 PM. Reason: merged
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co2 equipment, co2 help, co2 pressure, diy co2

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