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I have been running CO2 into my 20 gallon high tank for about two weeks now. My bubble checker says that I have good CO2 levels for plant growth.
I run 48 watts of T5 light into the tank.

These plants are tied to driftwood.

Since introducing CO2 I have noticed yellowing and deterioration of some of the leaves on these plants. They were gorgeous before adding CO2.

Could CO2 be hurting these plants?

Thank you.
 

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Co2 is not the problem. The problem is a lack of nutrients. Dose more, because your plants are using more now that you have co2.
 
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