The proof of concept project tested whether it is possible to construct a stable and productive modular synthetic ecosystem for indoor or limited outdoor spaces. The design relied on four modules: green waste digester, algal culture, zooplankton culture, and fish. We measured several biotic and abiotic variables to assess the stability and productivity of the components. We include the following temporal series data: Chlorophyll a, Daphnia population, dissolved oxygen, duckweed density, ecosystem productivity, pH, and vegetable waste additions.