We have had a hectic, but very productive last week! The
team heading up the aquaponics project (Jim Swan, Glynn Barber, and Mike Dunn)
was here over the weekend and we were able to get things really moving on the
system. It is so exciting to have more than just tubs of water in the
greenhouse! But, all of this made me realize you may not all really understand
the aquaponics system. So, I thought I would take a minute and try to explain
this system that will produce fish and vegetables for food without taking any
soil and using very little space….
There are 2 large tanks that hold
fish. We just put tilapia in the system and they will be ready to harvest and
eat in about a year. Theses fish are only in one tank, so we will stock the second tank in 6 months for a staggered harvest. We feed the fish and they, of course, produce waste.
Water is pumped from the fish
tanks through a long set of troughs that will soon hold plants.
Individual seeds are planted in a
small amount of growing medium.
As soon as these seed sprout, each
plant is placed in a hole of one of the growing trays in the troughs. The water
full of fish waste is great fertilizer for the plants. The roots growing
through the holes of the growing trays will absorb all of these nutrients and clean
the water. Clean water is then pumped back into the fish tanks.
The heart of the system is the pump that circulates all of
the water, and therefore nutrients and allows for filtration.
With all the added nutrition, plants grow very quickly and
we plan to have our first vegetable harvest in about 5 weeks. We have planted
green beans, lima beans, beefsteak tomatoes, cherry tomatoes, zucchini,
cucumbers, large watermelon, sweet baby watermelon, cantaloupe, kohlrabi, swiss
chard, cabbage, and lettuce. Soon we hope to be able to plant strawberries,
herbs, and vanilla. We also hope to add to the system to accommodate rooting
vegetables, such as carrots, potatoes, and onions.
The overall goals of this system are to provide food and
extra income for the orphanage, as well as determine if this system will work
well in Haiti so that more like it can be started.