The Planted Tank Forum - View Single Post - A couple C02 questions for a pro
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post #2 of (permalink) Old 07-13-2005, 09:15 PM
Rex Grigg
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Fish will contribute a small amount of CO2. Plants can grow without CO2. But some plants that are more light demanding also require the use of CO2. CO2 in a planted aquarium is a lot of like N2O in an engine. It drives the plants faster and helps control algae.

If you can raise the CO2 levels 3-4 ppm it will help. As much as getting them into a higher range? I doubt it.
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