Oxygen is not just in demand above the water surface. It also fulfils important tasks in the water. Fish require oxygen to breath and microorganisms require oxygen to clean the water. This is why it is especially important to ensure adequate oxygen. Dead plants and fish waste settle on the floor as pond silt and bind oxygen. Moreover, foul odours or even pathogens can form. To keep your pond in top condition throughout the year we recommend suctioning out the floor silt before it can burden the water. The PondoVac series pond vacuums are optimally suited in this regard, and your pond will thank you with healthy, clear water.