Based on this product's specifications, here are some alternatives and similar models
Garden oxygen hose Cellfast 6 mm diameter, length 50 m (CF20020R)
Summary description:
Cellfast garden oxygen hose with 6 mm internal diameter and 50 m length (model CF20020R). Designed for low-pressure air or oxygen distribution in gardening, greenhouse ventilation, aquarium aeration, or small pneumatic systems. Flexible, lightweight tubing suitable for routing through beds, planters, or along greenhouse benches for oxygen delivery and aeration tasks.