Thanks to the work of the glorious John-Mark A Phillips the Hack lab has a small working aquaponics system.
The V5 Hydrolife was brought online on 2-16-15 (Star date 92732.07) and contained 1 gold fish. The waste produced by the fish is used to feed a plant.
Population; 1 gold fish (Subject 1)
Date of creation; 2-16-15
a system of aquaculture in which the waste produced by farmed fish or other aquatic animals supplies nutrients for plants grown hydroponically, which in turn purify the water.
"thanks to its automatic recirculating system, aquaponics does not require much monitoring or measuring"
-wikipedia 2-19-15 http://en.wikipedia.org/wiki/Aquaponics