The Tropical Delfin Single is a durable, air-driven sponge filter designed for freshwater aquariums up to approximately 150liters. Its key feature is a horizontally positioned round sponge that offers a large surface area for filtration while maintaining a very gentle flow, ideal for shrimp, fry, breeding tanks, or any setup with delicate livestock.Tropical Sponge Filter Delfin Single+ large horizontal round sponge for mechanical and biological filtration+ air-powered: quiet, energy-efficient, and vibration-free+ gentle water intake - safe for shrimp and sensitive fish+ easy to clean and long-lasting+ replacement sponge separately availableInstallation & operationConnect the filter to an air pump using airline tubing. The rising air creates suction, drawing aquarium water evenly through the sponge where debris is trapped and beneficial bacteria thrive. When flow diminishes, gently rinse the sponge in a bucket of aquarium water. Do not use tap water to preserve the biofilm. The sponge