CO2 system cost - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 03-09-2009, 12:43 AM Thread Starter
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CO2 system cost

How much does it cost to make a CO2 system? Would it be cheaper just to buy one?

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post #2 of 9 (permalink) Old 03-09-2009, 01:04 AM
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The cost depends on you. If you are good with mechanical things, you can buy a used regulator on Ebay that will be better than the cheapest Aquarium regulators, buy a great needle valve, a solenoid valve, and the bits and pieces of plumbing to assemble it, for around $120 or so. Add a CO2 tank, for $50 or so, and you have a very good CO2 system, better than what you could get for that price buying the stuff new.

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post #3 of 9 (permalink) Old 03-09-2009, 06:11 PM Thread Starter
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I'm just going for a simple yeast CO2 system for my 46 gallon tank. Is that simpler and cheaper?

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post #4 of 9 (permalink) Old 03-09-2009, 06:16 PM
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It's cheaper. Not so sure about simple, in the long run.
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post #5 of 9 (permalink) Old 03-09-2009, 06:22 PM
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yes cheaper, but takes a lot more messing aorund with it to get it right. Will not cut it if you ever decide to go up to high tech.

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post #6 of 9 (permalink) Old 03-09-2009, 08:24 PM
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yeast CO2 has virtually no startup cost, but it's more time-intensive and it has a higher maintenance cost. You can build a simple yeast system with a 2L bottle, a 20 oz. bottle, some silicone tubing, and a diffuser (as simple as the top of another 20 oz. bottle). Mine cost $15 startup, $4 for silicone tubing, and $10 or so for an internal filter to diffuse. The issue is that it will be inefficient and the yeast mixture will need to be changed every 2 weeks. (sugar, water, baking soda, and yeast)
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post #7 of 9 (permalink) Old 03-10-2009, 04:59 AM
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I have read that for tanks above 30 gallons it is best to use a pressurized Co2 system. Have read that it is ceaper to buy parts and put it together. Some use paint ball canisters.

More info at Rex Griggs site.

Once saw 1 at craigslist.org for $60.
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post #8 of 9 (permalink) Old 03-10-2009, 05:13 AM
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FWIW my local welding supply store offers a $90 deposit on a cylinder that you get back once you're finished using the tank. Every 7 years they call you to see if you still have it and what not...

Sure you have to pay $90...but in reality it's still free.

And you can get a regulator w/ solenoid off ebay for less then $80 if you look hard enough. Sure you won't get the best there is but....
Also if you don't get a regulator you'll have to turn the CO2 on/off yourself or you'll be wasting 2/3 of your gas every tank while your lights are off.

This basically paid for the $20 extra for the solenoid the first time i filled the tank which lasted longer.

But yeah...DIY yeast systems are not the best for tank 30g or bigger.
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post #9 of 9 (permalink) Old 03-10-2009, 11:15 PM
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$120 is about right for my first regulator and build.

Bought a used Victor Regulator on Ebay $50
Solenoid w/ cord $30
Fabco needle valve $22
fittings & misc $10
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