- Suitable for 2-8 gallon small micro desktop freshwater and seawater fish tank aquariums. Pre-fill water before first use to ensure simple setup. - Space saving external design: does not occupy space inside the tank. The water inlet uses a flower basket style inlet to prevent fish and shrimp from being drawn in, while a wide water outlet increases oxygenation and helps slow the inflow for gentler water movement. - External waterfall filtration: mimics a natural waterfall flow with quiet operation. The flow is adjustable, helping circulate and filter impurities, improve water quality, increase dissolved oxygen, and reduce the frequency of water changes. - Easy to power and use: USB power interface. Can be connected to a phone charger (not included), mobile power bank, or USB power adapter (output DC 5V/2A). - Practical use scenarios: - Desktop nano tanks in home or office environments where space is limited and quiet operation is important. - Small freshwater or seawater setups such as shrimp tanks or delicate fish where gentle, adjustable flow helps prevent stress and injury. - Temporary or backup filtration for quarantine or observation tanks, providing additional aeration and water cleaning without altering main tank equipment. - Key attributes at a glance: - Compatibility: suitable for 2-8 gallon micro desktop tanks, both freshwater and seawater. - Function: external waterfall filtration with adjustable flow for improved oxygenation and water clarity. - Size and placement: external unit designed not to take up tank space. - Inlet design: flower basket inlet minimizes fish and shrimp inhalation. - Performance: circulates water, filters impurities, reduces water change frequency. - Power: USB powered, compatible with standard 5V/2A supplies.