A cleaning device

There is provided a device for cleaning solid hydroponic growing media for example spherical clay pebbles, the cleaning device comprising a first slide 110 tilted in a first direction relative to a horizontal plane and a second slide 112 located below the first slide and tilted in a second direction relative to a horizontal plane, the first and second slides being arranged such that, in use, hydroponic growing media placed at an upper end of the first slide is caused to move under gravity along a path down the first and second slides, said movement causing dirt, debris and plant matter to be separated from the solid hydroponic growing media. This arrangement enables efficient cleaning of hydroponic growing media. The upper and lower slides of the device may be curved such that their respective upper ends are steeper than the lower ends (figure 4). The device may also have a box 140 to hold the growth media prior to cleaning and a catching means 138 at the bottom of the lower slide.