Two operations grow produce using water from tanks enriched by koi
Visiting an aquaponic farm feels like landing at a space station or stealing a glimpse into a Seussian future.
Unlike Old McDonald’s farm, there’s no dirt, tractors, barns filled with hay, chicken coops or bags of fertilizer. In place of these long-established farm items are rows and rows of rapidly growing produce using 10 percent of the water needed for traditional farming. Aquaponic systems can be set up in a space as small as a closet.
These farms operate by creating a symbiotic relationship between fish and plants. It begins with a fish tank. Fish eat high-quality food that’s primarily absorbed in their bodies. Helpful bacteria in the tank turn ammonia from the fish waste into nitrites and then nitrates. The water is pumped from the tank into the area where the plants grow. Plant roots suck up the nitrates. The clean water then flows back into the fish tank to begin the cycle again.
In Clark County, two farmers have built their own aquaponic systems.
A recent study by a group of scientists at Purdue University found that fresh produce from aquaponics had a higher economic value and lower environmental impacts. The researchers concluded that aquaponic farms had 45 percent less of an environmental impact than traditional farming and were less impactful than hydroponics because the fish waste replaces the fertilizer used in hydroponics. The researchers noted that changing the energy source from the mix of coal, natural gas, and wind to all wind would reduce the environmental impact up to 48 percent.