Place the Betta Bed just below the surface (2 cm), allowing the Betta to gasp for air easily. Do not place the Betta Bed near the filter outlet or near the aquarium heater. 100% safe for your fish and aquarium ecosystem. First rinse with clean tap water before placing it into the aquarium. Clean regulary. Never use chemicals for cleaning as these will harm your fish, clean with fresh tap water only.