It may seem odd to clean a greenhouse growing system that doesn't use dirt, but even hydroponic systems need to be cleaned. Hydroponic gardening is a system where plants are grown in a soup made of nutrients and water. Periodically, plants should be removed and the liquid reservoirs should be scrubbed out to remove mineral deposits. This promotes the overall health of plants, as well as preventing clogs or machinery malfunctions in the hydroponic systems.
Drain the liquid nutrient from the reservoir into a bucket with a siphoning hose in one bucket.
In a second bucket, mix a solution of one part bleach and nine parts water.
Dip the sponge in bleach water and scrub the surfaces of the reservoir with the cleaning solution.
Scrub the corners, difficult-to-reach areas and stubborn deposits with a nylon bristled brush.
Rinse the reservoir with a garden hose thoroughly to remove all traces of bleach from the surfaces.