DIY CO2 for well planted 70gallon tank? - Aquarium Advice

Tiffi · 08-22-2005, 01:51 PM

Hi,

I am originally from Germany and live in TN, USA now. At my parents house in Germany I had a 55g tank before with lots of plants and Dennerle natural [acronym:11e80c6def="Carbon dioxide"]CO2[/acronym:11e80c6def] system. It all worked very well and grew over my head.

I want to get a 70g here now and was wondering if natural or [acronym:11e80c6def="Do it yourself"]DIY[/acronym:11e80c6def] [acronym:11e80c6def="Carbon dioxide"]CO2[/acronym:11e80c6def] would be enough for a tank that size?

What would I have to look for to get enough [acronym:11e80c6def="Carbon dioxide"]CO2[/acronym:11e80c6def] dissolved? What kind of diffusor?

Thanx for your answers,
Vanessa

greenmaji · 08-22-2005, 02:46 PM

for a 70 gallon tank you would likely need bigger [acronym:c357cb00ea="Carbon dioxide"]CO2[/acronym:c357cb00ea] generators..

cplawrence · 08-22-2005, 05:24 PM

I understand why most people say you should be looking at pressurized [acronym:c8c77e96a5="Carbon dioxide"]CO2[/acronym:c8c77e96a5] for that large of a tank, but could one in principle simply use many [acronym:c8c77e96a5="Do it yourself"]DIY[/acronym:c8c77e96a5] reactors?

Tiffi · 08-22-2005, 06:08 PM

I was planning on building a system with two 2liter bottles (if that's ok) and maybe a power reactor. Could that work or not enough?

koffee · 08-23-2005, 03:00 PM

The problem with [acronym:6cada493ab="Do it yourself"]DIY[/acronym:6cada493ab] is keeping it consistant. I'm learning just how much work that is with two bottles on a 29 G. So much, in fact, that I am really leaning towards removing it until I can afford pressurized [acronym:6cada493ab="Carbon dioxide"]CO2[/acronym:6cada493ab].

Things to keep in mind:

Always use at least two bottles and never change all of them at the same time.

Check the pH often! The pH will rise as less [acronym:6cada493ab="Carbon dioxide"]CO2[/acronym:6cada493ab] is generated by the yeast. Your plants might just slow down until there is more [acronym:6cada493ab="Carbon dioxide"]CO2[/acronym:6cada493ab], but these fluctuations will be really hard (if not fatal) for your fish.

NEVER do anything to slow or prevent the release of pressure from the [acronym:6cada493ab="Carbon dioxide"]CO2[/acronym:6cada493ab] generating bottles. They can and will explode, cause a big smelly mess and possible damage to things and/or people. You can NOT just put in an air valve to slow down the [acronym:6cada493ab="Carbon dioxide"]CO2[/acronym:6cada493ab] release.

If you think you are getting too much [acronym:6cada493ab="Carbon dioxide"]CO2[/acronym:6cada493ab] (test results, gasping fish), your only option is to remove some [acronym:6cada493ab="Carbon dioxide"]CO2[/acronym:6cada493ab] (surface agitation, etc.) rather than slow it down - unless you remove the [acronym:6cada493ab="Carbon dioxide"]CO2[/acronym:6cada493ab] injector entirely.

08-22-2005, 01:51 PM	#1
Tiffi Aquarium Advice Addict Join Date: Aug 2005 Location: first ST-Germany, now TN-USA Posts: 1,052 Images: 19	DIY CO2 for well planted 70gallon tank? Hi, I am originally from Germany and live in TN, USA now. At my parents house in Germany I had a 55g tank before with lots of plants and Dennerle natural [acronym:11e80c6def="Carbon dioxide"]CO2[/acronym:11e80c6def] system. It all worked very well and grew over my head. I want to get a 70g here now and was wondering if natural or [acronym:11e80c6def="Do it yourself"]DIY[/acronym:11e80c6def] [acronym:11e80c6def="Carbon dioxide"]CO2[/acronym:11e80c6def] would be enough for a tank that size? What would I have to look for to get enough [acronym:11e80c6def="Carbon dioxide"]CO2[/acronym:11e80c6def] dissolved? What kind of diffusor? Thanx for your answers, Vanessa

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08-22-2005, 02:46 PM	#2
greenmaji Aquarium Advice Addict Join Date: May 2005 Location: Central Kentucky Posts: 5,937	for a 70 gallon tank you would likely need bigger [acronym:c357cb00ea="Carbon dioxide"]CO2[/acronym:c357cb00ea] generators..

08-22-2005, 05:24 PM	#3
cplawrence Aquarium Advice Freak Join Date: Mar 2005 Location: Grand Rapids, MI Posts: 221	I understand why most people say you should be looking at pressurized [acronym:c8c77e96a5="Carbon dioxide"]CO2[/acronym:c8c77e96a5] for that large of a tank, but could one in principle simply use many [acronym:c8c77e96a5="Do it yourself"]DIY[/acronym:c8c77e96a5] reactors?

08-22-2005, 06:08 PM	#4
Tiffi Aquarium Advice Addict Join Date: Aug 2005 Location: first ST-Germany, now TN-USA Posts: 1,052 Images: 19	I was planning on building a system with two 2liter bottles (if that's ok) and maybe a power reactor. Could that work or not enough?

08-23-2005, 03:00 PM	#5
koffee Aquarium Advice Apprentice Join Date: Aug 2005 Location: AK Posts: 22 Images: 5	The problem with [acronym:6cada493ab="Do it yourself"]DIY[/acronym:6cada493ab] is keeping it consistant. I'm learning just how much work that is with two bottles on a 29 G. So much, in fact, that I am really leaning towards removing it until I can afford pressurized [acronym:6cada493ab="Carbon dioxide"]CO2[/acronym:6cada493ab]. Things to keep in mind: Always use at least two bottles and never change all of them at the same time. Check the pH often! The pH will rise as less [acronym:6cada493ab="Carbon dioxide"]CO2[/acronym:6cada493ab] is generated by the yeast. Your plants might just slow down until there is more [acronym:6cada493ab="Carbon dioxide"]CO2[/acronym:6cada493ab], but these fluctuations will be really hard (if not fatal) for your fish. NEVER do anything to slow or prevent the release of pressure from the [acronym:6cada493ab="Carbon dioxide"]CO2[/acronym:6cada493ab] generating bottles. They can and will explode, cause a big smelly mess and possible damage to things and/or people. You can NOT just put in an air valve to slow down the [acronym:6cada493ab="Carbon dioxide"]CO2[/acronym:6cada493ab] release. If you think you are getting too much [acronym:6cada493ab="Carbon dioxide"]CO2[/acronym:6cada493ab] (test results, gasping fish), your only option is to remove some [acronym:6cada493ab="Carbon dioxide"]CO2[/acronym:6cada493ab] (surface agitation, etc.) rather than slow it down - unless you remove the [acronym:6cada493ab="Carbon dioxide"]CO2[/acronym:6cada493ab] injector entirely.