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post #1 of 5 (permalink) Old 02-14-2013, 07:57 AM Thread Starter
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CO2 question

What is the range of CO2 (in ppm) that is good for plants?
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post #2 of 5 (permalink) Old 02-14-2013, 09:15 AM
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Usually, people aim for approximately 30 ppm of CO2.

Anthony

A Primer to Pressurized CO2 and A Primer to Planted Tanks
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post #3 of 5 (permalink) Old 02-14-2013, 09:59 PM
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As far as just the plants are concerned, you can use 100 ppm of CO2 and they will be happy. But, the fish will be dead. The limit is based more on what the fish can live with than what the plants need. The more dissolved oxygen you have in the water, the more CO2 the fish can live with. The more light you have, the more CO2 the plants need to grow as fast as the light is forcing them to. With low enough light, the plants can grow with just what CO2 dissolves into the water from the atmosphere, but more CO2 will make the plants grow faster and more healthy.

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post #4 of 5 (permalink) Old 02-15-2013, 01:34 AM Thread Starter
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Atmospheric CO2 is 395.55 ppm. That explains why Fish can't survive out of water and ppt grow plant emersed. LOL

http://co2now.org/
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post #5 of 5 (permalink) Old 02-15-2013, 02:45 AM
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Quote:
Originally Posted by ryantube View Post
Atmospheric CO2 is 395.55 ppm. That explains why Fish can't survive out of water and ppt grow plant emersed. LOL

http://co2now.org/
The last time I checked, water was a lot heavier than air.

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