Did you know that toilet tank water is technically clean? It’s called gray water--the household water coming from baths, sinks, and other appliances. We took advantage of this underutilized water source to design a zero waste life cycle for growing household plants. Hydropoonics is a self-sufficient plant system that utilizes toilet tank water to fulfill the needs of a hydroponic system, the plant, and the human who develops care and awareness of the resources in their household.