Best CO2 Aquarium Water Treatments of 2025

The API CO2 BOOSTER is designed to promote healthy plant growth in your freshwater aquarium. It provides essential carbon that plants can easily absorb from the water, ensuring your greenery thrives. You can use it on its own or alongside a CO2 system, all without affecting the pH levels of your aquarium. For best results, daily application is recommended, helping you maintain lush and vibrant aquatic plants that enhance the beauty of your tank.

The Interpet Plant CO2 is designed to keep your aquarium plants thriving while preventing unwanted algae growth. With its easy dose pump, you can conveniently add liquid CO2 to your aquarium, promoting lush and healthy growth for both tropical and coldwater plants. You only need to use one pump per 20 litres of water daily, making it simple to maintain. Plus, it’s safe for your filters and all aquatic life, including fish, shrimp, and invertebrates.

The API CO2 Booster is an essential treatment for promoting plant growth in your freshwater aquarium. It adds vital carbon in a form that your plants can easily absorb from the water, ensuring they thrive. You can use it on its own or alongside a CO2 system, all without altering the pH levels of your aquarium. This means you can maintain a stable environment for your fish while enhancing plant health.

The Tetra CO2 Optimat Kit is designed to enrich your aquarium water with CO2, promoting lush and healthy aquatic plants. By using this complete set, you will find that your plants grow stronger, enhancing the overall vitality of your underwater environment. This kit also aids in increasing the oxygen content in the water, which is crucial for the well-being of your fish. Additionally, the system helps prevent lime deposits on leaves and glass, ensuring your aquarium remains clear and clean.

NT Labs CO2 Boost is a vital addition for any aquarist looking to promote healthy plant growth in their aquarium. By providing a consistent source of carbon, this liquid helps aquatic plants flourish and effectively reduces harmful algae by eliminating excess macronutrients like nitrate and phosphate. It's an essential tool for aquascaping, offering a cost-effective alternative to expensive CO2 gas injection systems. The product is easy to use, requiring a simple calculation of your aquarium's volume and daily application to ensure your plants receive the carbon they need.

The TWINSTAR CO2 Diffuser is designed for freshwater aquariums up to 120 gallons. With very fine atomisation, it ensures that the carbon dioxide is distributed evenly, promoting healthier plant growth. The diffuser accommodates a 6/4 mm hose, making it compatible with various aquarium setups. Additionally, it includes a transparent suction cup, allowing for easy installation and positioning within your aquarium. These features collectively enhance the overall health of your aquatic environment, ensuring your plants thrive and your aquarium looks vibrant.

The CENPEK CO2 Monitor is an essential tool for any aquarium enthusiast. Made from high-quality glass, it allows you to easily measure CO2 levels at a glance, ensuring your aquatic plants thrive. Installing it just below the water surface, about 10cm down, helps you keep a close eye on the carbon dioxide levels vital for plant health. This monitor is particularly beneficial for those with tropical fish and aquatic plants, as it aids in maintaining optimal conditions in your tank.

The JBL CO2 Taifun Spiral 5 is an expandable CO2 reactor designed for freshwater aquariums ranging from 40 to 200 litres. It promotes healthy plant growth by ensuring lossless enrichment with carbon dioxide, which is essential for aquatic plants. You will appreciate the convenience of operating it without an additional pump or separate bubble counter. Installation is straightforward, connecting easily to your CO2 fertiliser system. Plus, the collection cap helps prevent CO2 loss, ensuring efficient use of resources.

The Ista CO2 Cartridges are designed as replacement options for the Ista professional CO2 system, ensuring you have a reliable source of carbon dioxide for your planted aquarium. Available in both 45g and 88g sizes, you can easily choose the right cartridge for your needs when ordering. As Ista specialises in advanced aquarium equipment, you can trust the quality and performance of these cartridges, enhancing the growth and health of your aquatic plants. Enjoy a thriving aquarium environment with this top-notch CO2 solution.

The JBL PROFLORA CO2 Module is a high-quality expansion module designed for the PROFLORA CO2 TAIFUN SPIRAL 5 and 10 reactors, enhancing their capacity for aquariums up to 200 litres. Its ease of use allows you to integrate it seamlessly into your existing setup, making maintenance simple. Offering excellent value for money, this product ensures you get the most from your investment in aquarium care. With its reliable performance, you can enjoy a thriving aquatic environment without hassle.