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Aquarium Plant Care & CO2

Healthy aquarium plants need light, nutrients and carbon dioxide. A DIY CO2 kit is a low-cost way to try supplemental CO2.

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Plant Care & CO2 FAQ

What does CO2 do for aquarium plants?

Plants use carbon dioxide for photosynthesis. Extra CO2 can boost growth and color when light and nutrients are also adequate.

Is a DIY CO2 kit safe?

Citric acid reactors are a simple way to start, but output varies. Watch your fish for signs of stress, keep good surface agitation, and follow the kit instructions.

Do I need CO2 for every planted tank?

No. Many low-light plants do well without added CO2.