A device and method for continuous culturing of live food for an aquarium. Phytoplankton and zooplankton are cultivated in separate adjacent chambers 1, 2 provided with light 4, heat 6 and aeration 5. Fluid from the phytoplanakton tank overflows 19 into the zooplankton tank to provide feed for the zooplankton. Fluid from the zooplankton tank, including zooplankton is removed and sent to the aquarium to provide food for the species therein. Fluid from the aquarium is subsequently removed, filtered and sent to the phytoplankton tank. The process repeats continuously with the aid of dosing pumps 8a, 8b. Alternatively waste nutrients from the zooplankton are fed to the phytoplankton system and the zooplankton removed manually from the zooplankton tank and fed to the aquarium.
