A closed loop compost tea brewing system with a hydroponic reservoir and a compost tea brewing assembly configured to brew compost tea. The compost tea brewer assembly includes a tea brewing reservoir. The system includes has a closed loop arrangement fluidly connecting the tea brewing reservoir and the hydroponic reservoir. The closed loop arrangement is configured to provide continuous fluid flow from the tea brewing reservoir to the hydroponic reservoir, which is recirculated back from the hydroponic reservoir to the tea brewing reservoir.
