Oxygen Pump for Solar Pond Aerator with Air Hose and Floating Bubble Stones, Water Oxygenator for Fish Tanks, Fountains, Bird Baths, Circulation, Black...DEBUNS

Hello, I have purchased several models of air pump for the pond in my garden. This model is the best for me. Other models with intermittent operation also work at night but are much noisier. This model is much quieter, unfortunately it works continuously as soon as it is exposed to the sun and therefore does not accumulate energy to operate at night or when the light decreases. This model is increasingly difficult to find, so I have made a small stock. But the last pump I bought has been working for 3 years.