Aqua One Air Pump SR2500 The Aqua One Precision Air Pump SR2500 delivers reliable, quiet and efficient aeration to improve water circulation, oxygen levels and overall filtration performance in medium-sized aquariums. Part of Aqua One’s long-trusted Precision series, the SR2500 features robust construction, a smooth-running diaphragm system and strong airflow output to help prevent harmful ammonia and nitrite build-up. With two outlets and an adjustable airflow dial, this versatile pump can run multiple airstones, sponge filters or air-driven ornaments at once. It uses standard 4mm airline tubing and offers proven durability for long-term aquarium health. Key Features & Benefits Quiet, reliable operation Adjustable airflow for full control Two outlets for running multiple devices Helps reduce ammonia and nitrite accumulation Strong oxygenation improves filtration efficiency Long-lasting, high-quality construction Simple diaphragm replacement Uses standard 4mm airline (not included)