Aquarium with compartments that allows culture of plants and small animals to produce a viable food chain or food source to allow a higher animal (fish) to exist in the self-sustaining environment. The aquarium comprises one main chamber 7 and at least one, preferably two, smaller subsidiary chambers 1, 2 which are used as farming compartments. The main chamber is connected to each subsidiary chamber via at least one aperture 4 dimensioned to allow passage of water and water fleas but to prevent passage of fish. The subsidiary chambers are connected by a hole. The aquarium is either provided with a Growlamp or is placed on a windowsill. A partial lid (3, fig 2) heater 10, oxygenator 9, fish hide 6 and algae bag 15 may also be provided. The aquarium can be used to house water fleas (daphnia) 12, filamentous algae, snails 14 and fish 13 amongst other things.
