Do You Really Need CO₂ in a Planted Aquarium?

CO₂ injection can transform a planted tank — but it isn't mandatory for every setup.

Low-tech can be beautiful

Plenty of stunning tanks run with no CO₂ at all, using slow-growing plants and modest light. If that's your style, skip the cylinder and enjoy the low maintenance.

When CO₂ helps

If you want fast growth, dense carpets like Monte Carlo, or vivid red stems, CO₂ paired with strong light and fertilisation makes the difference.

Start safely

Use a quality regulator with a solenoid, a bubble counter and a drop checker. Increase the rate gradually and always watch your fish — their comfort comes first.