fishkeeper Siphon Ball Pump Head Replacement – Compatible with FK018 and Most Manual Aquarium Gravel Cleaners, 80GPH High Pressure Quick Start Vacuum Pump for Easy Water Change (Small)

✦Quick & Easy Water Change: Simply start siphon to initiate automatic water flow in just 2–5 squeezes with our built-in quick-start valve for effortless aquarium maintenance. Ideal for fishkeeper's FK018 and most standard aquarium siphon hoses with inner dia of 0.31/0.43 inch.

✦Powerful Suction for Efficient Cleaning: Large size delivers 256 GPH strong suction, while small size offers 80 GPH rapid flow. Effectively removes debris, waste, and old water from your fish tank or aquarium without disturbing substrate.

✦Durable & Reinforced EVA Material: Made from high-quality EVA with a thickened 1.5mm reinforced starter ball that withstands repeated squeezing, enhances pressure retention, and ensures long-lasting durability.

✦Built-in Check Valve & Secure Seal: Features an integrated black check valve and sealing ring for excellent airtight performance and reliable suction. Prevents backflow and maintains consistent water flow during cleaning.

✦Easy to Clean & Maintain: Removable pump heads allow quick inspection and rinsing. Warm Usage Note: After cleaning, the pump head's inlet and outlet and internal check valves must be reinstalled in their original orientation and position, otherwise will cause the product to fail.