Proven Quality: Crystal Quartz Gravel 1-2 mm Key Features: Bio-Function: Effectively supports the aquarium's ecosystem. CO2 Resistant: Ideal for plant growth and CO2 supply. Lightfast and Water Neutral: Retains natural color without affecting water quality. Fine Grain Size: 1-2 mm, optimal for bottom-dwelling fish and plants with delicate root systems. Safe for Aquatic Life: Rounded edges prevent injuries.   Product Description: Crystal Quartz Gravel with a 1-2 mm grain size is a trusted classic from Dennerle, making it a top choice for aquarium enthusiasts for decades. This gravel not only provides a visually appealing aesthetic but also ensures perfect biological functionality in the aquarium without hardening the water. It is lightfast, CO2-resistant, and retains its natural color even after years of use. The gravel is water neutral and completely free of harmful substances, making it an environmentally friendly option. The fine grain size benefits bottom-dwelling fish and minimizes dirt accumulation, while the rounded edges protect aquatic life from injuries. Crystal Quartz Gravel offers an excellent surface for the settlement of beneficial bacteria, making it an essential component for a healthy aquarium ecosystem. Dennerle Crystal Quartz Gravel does not require pre-washing (exception: natural white color).

Nighttime CO2 Control: The Carbo NIGHT Pressure Regulator Key Features: Integrated Night Valve: Automatically shuts off CO2 when the lights go out. Steady CO2 Supply: With Dynamic Valve Control for consistent dosing. High-Quality Material: Precision pressure regulator made from milled aluminum. Easy Monitoring: Blue LED indicates active CO2 flow. Guaranteed Safety: With backflow prevention and safe 9V solenoid valve operation. Product Description: The Carbo NIGHT CO2 pressure regulator revolutionizes CO2 supply in your aquarium with its smart night shut-off function. Equipped with an integrated solenoid valve, it ensures safe and consistent CO2 dosing optimized for your aquatic plants' photosynthesis. The precision regulator, made from high-quality aluminum, guarantees durability and reliability. A blue LED indicator makes it easy to monitor the CO2 flow status at any time. With innovative backflow protection and safe 9V operation, the Carbo NIGHT provides maximum safety for your aquarium. Ideal for demanding aquascapes and healthy aquatic plants.