The fish excretes are broken down into nutrients for the plants, and the plants provide a natural filter for the water the fish live in. Aquaponics is thus based on the natural symbiosis between plant and water life. Inputs include primarily local nutrients like worms from our composting bins, and struvite from our struvite reactor, produced by men’s urine from the Café. In the future, we will be experimenting with algae and insect production.