300L/H Ultra Quiet Aquarium Air Pump 5W High Output Oxygen Aerator with Stone, Tubing, Check Valve & Suction Cup for Fish Tank

Equipped with all accessories: includes 5W aquarium air pump x 1, air line x 2, air stone x 2, suction cups x 2, backflow valve x 2, control valve x 2 Powerful: This aquarium air pump is only as large as a palm, compact in size, but very powerful. It has two outputs and can pump 300L air into the aquarium at maximum power. It is a good choice for oxygen supply to aquariums under 450L. This air pump uses ABS environmentally friendly plastic housing, which is thickened with high density, wear-resistant, drip-resistant. The appearance looks new and unique, practical and durable. Improved aerator fish pump: the improved air pump has a smooth surface design with four shock-absorbing silica gel columns. It has a strong airflow and a quiet design ⚠️ Important note before first use：Before the first use, the ceramic air stone must be completely soaked in water for at least 12 hours. This opens all the pores of the stone, and it can produce sufficiently fine air bubbles during operation. A too short soaking time leads to low air yield and impairs performance. ⚠️ Noise can be adjusted the size by the control valve, gas stone do not stick to walls and floor, when water is too little, the oxygen pump should not be opened too large.