DIY c02 kit - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 12-26-2010, 12:41 AM Thread Starter
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Arrow DIY c02 kit

hello guys and girls.

i have recenty just purchased a load of plants for my tank. my substrate is "eco-complete" also
for this reason i have brought seachem liquid ferts, (trace, flourish, excel) i understand that "excel" is a liquid form of c02 and if this did'nt work for my plants then i wanted to try real c02...the thing is
i simply cannot afford to pay out big amounts of money on proper c02 systems, so im thinking of opting to make myself a DIY set-up instead.
i have done some reading up on the web about "DIY c02" and just wanted to confirm that this is the stuff i will need in order to make it.

x1 or 2, 2 litre fizzy drinks bottles (20 gallon tank) so 1 or 2 bottles?
x1 small T junction valve (possibly brass, making the joins air tight)
plastic tubing (air tubing)
silicone (optional?)
x2 nipple valves (to be siliconed to the bottle lids)
yeast
suger x2 cups worth
warm water

also which is easier?
fed threw the filter, or an air stone?

and one last thing....how does it actually work?
like as in the reaction of yeast and suger mixing together making it "pressurised"...does a clear gas form of c02 then pass threw the tubing at will into the tank?
if i try this i want it to be as succesful as possible...im new to c02
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post #2 of 4 (permalink) Old 12-26-2010, 01:08 AM
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For your DIY CO2, you will probably not need the nipple valves. If you punch a small hole, and use a pair of pliers to pull the airline tubing through the hole, it should be airtight.

You can start off with a single 2L bottle, and if you fin that it is insufficient, you can add an extra bottle.

You can feed the CO2 through the filter or through an airstone; either way is quite simple.

CO2 is produced in this setup when yeast begins to ferment the sugar. A metabolic byproduct of this fermentation process is CO2.

Anthony


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post #3 of 4 (permalink) Old 12-26-2010, 01:16 AM Thread Starter
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thanks darkblade48
will deffo try the pliers job first...also saves a bit of money (and every little helps) lol

so would i be correct in thinking that when the yeast ferments the sugar, it turns into a gas which then freely moves threw the tubing and into the tank...coming out the tank end as bubbles?
also my tank is only 20 gallons, so i think 1 bottle should be enough?
how long does a bottle of this stuff last exactly?
because once it starts working you cant stop it until it runs out right?
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post #4 of 4 (permalink) Old 12-26-2010, 01:18 AM Thread Starter
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is the "fermentation" what causes the pressure to build up in the bottle?
causing the gas to be pushed up threw the tubing?
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