Dennerle Carbo Bio Start CO2

Dennerle Carbo Bio Start — Natural Bio CO₂ System for Planted Aquariums

The Dennerle Carbo Bio Start is a complete bio CO₂ fertilization system designed to support strong, healthy plant growth in freshwater aquariums. Using biological CO₂ generation from renewable gel, it delivers a steady and natural supply of carbon — the most important nutrient for aquatic plants. This improves photosynthesis, promotes vibrant plant colours, and helps plants outcompete algae.

CO₂ production begins automatically within 24–48 hours after setup, making Carbo Bio Start an ideal solution for both new and established planted tanks.

Key Features

• Complete bio CO₂ system for freshwater aquariums
• CO₂ Constant Gel made from renewable raw materials
• Steady CO₂ release for up to approximately 40 days per gel depot
• Includes diffuser, hose, gel depot and activator (varies by model)
• Simple to install and easy to use
• Supports faster plant growth and stronger root development
• Helps reduce algae by improving plant competitiveness