Aquarium External Filter Accessories Inflow Outflow Kit for Canister Filter 1… on July 14, 2026 July 25, 2026 Inflow and outflow fits tubing : all for ID 1/2″(12mm) water hose ;. #3,208 in Aquarium Filter Accessories. Manufacturer : guanyu aquarium. Manufacturer: guanyu aquarium. Suitable aquarium glass : thickness less than 5/16″(8mm);.