Fishes Tank Slow Flow Outlet - Purpose: provides slow, controlled discharge to create a natural water movement in your aquarium while maintaining efficient flow. - Design: angled outlet with a duckbill or flute shape for improved flow distribution and reduced turbulence. - Sizes included: three inner diameters available in one package — 20 mm, 25 mm, and 32 mm — to fit common hose sizes. - Package contents: 3 pieces total, one of each size (20 mm, 25 mm, 32 mm). - Compatibility: designed to fit hoses or outlets with matching inner diameters for flexible use in various setups. - Applications: ideal for community freshwater tanks to create gentle currents around plants and fish; suitable for planted tanks to distribute flow without disturbing delicate growth; useful in fry or breeding tanks to prevent strong currents in nursery areas. - Notes: intended for aquarium use and should be matched to your filtration system’s outlet size for best results.