4L CO2 Cylinder for Planted Aquariums – High-Strength Steel with G5/8 Valve Thread (Empty)

Bullet Points:

• ✅ Durable High-Grade Steel – Built from corrosion-resistant, long-lasting material for reliable performance over time.

• ✅ 4-Litre Capacity (Empty) – Supplied without CO2 gas, ready for filling at your local filling station.

• ✅ Thread Size: G5/8 – Ensure compatibility with your regulator; check local filling stations support G5/8 threads before purchase.

• ✅ Equipped with Safety Valve – Includes an integrated safety valve for added protection under pressure.

• ✅ Ideal for CO2 Injection Systems – Perfect for planted aquariums using medium to high lighting where CO2 supplementation is crucial.

Product Description:

This 4-litre CO2 cylinder is specially designed for planted aquarium enthusiasts who want to boost plant health and growth. Constructed from high-quality, corrosion-resistant steel, it’s made to last and withstand pressurized conditions safely, thanks to its built-in safety valve.

Supplied empty, this cylinder is designed for refill and reuse. With a G5/8 thread size, it’s compatible with a wide range of CO2 regulators—though we strongly advise checking with your local CO2 filling station to confirm support for G5/8 threading.

In nature, aquatic plants receive abundant CO2 from natural sources like decomposing matter and sediment. But in a closed aquarium system, CO2 levels are often insufficient—especially in medium to high light setups where plants grow faster and require more carbon dioxide. Without added CO2, plants may suffer, and algae issues may arise.

Injecting CO2 into your aquarium water promotes vigorous plant growth, enhances coloration, and creates a balanced ecosystem. Even in low-light tanks, optional CO2 supplementation can still improve overall plant vitality.

Note: This product is an empty cylinder and does not contain CO2 gas.