From Shower Water to Food: Estonia´s Circular Aquaponics Testbed

How can water used in our homes become a resource for growing fish and plants? Mait Kriipsalu and Merrit Shanskiy present lessons from two indoor aquaponics systems developed at the Estonian University of Life Sciences, both using reclaimed water. Combining fish farming with soil-free plant cultivation, these systems explore how nutrients from fish can support plant growth while water circulates through the system. The session considers their potential for local food production and more efficient resource use in a changing climate. It also looks beyond food: could homes, offices and community spaces host living labs that reconnect people with nature? Drawing on collaboration across the university’s disciplines, the speakers explore the knowledge and practical skills needed to balance fish, plants, water and energy - and make circular systems part of everyday life.