From Classroom to Career: High Students Dive into Aquaponics
Some students at DuBois Area High School will begin the school year taking a new class in aquaponics as they experience first-hand a technology that is increasingly finding its way into the agriculture industry and holds promise for transforming how food is grown.
Kelly Stringer, a science teacher at the central Pennsylvania high school, runs the aquaponics system in the school’s former metal shop and developed the curriculum for the semester-long elective. Students will have the hands-on experience of growing various plants in the aquaponics system while learning about plant science, fish biology and nutrition. She has also incorporated an entire unit on exploring careers in horticulture.
“We have our own tiny ecosystem in the classroom,” Stringer explained.
That’s because aquaponics mimics a natural ecosystem, similar to a lake or pond, creating a closed loop, sustainable environment that allows fish, bacteria and plants to thrive. In short, aquaponics allows naturally occurring bacteria to harness excreted waste from fish to create the nutrients needed to feed plants. Most commonly, aquaponics is used to cultivate fish and greens, such as lettuce and herbs, for food. It’s promise lies in the flexibility and creativity for how and where the system is constructed. Aquaponics systems can be placed anywhere from small tanks on kitchen counters, to urban warehouses and rooftops or inside large greenhouses.
The new DuBois Area High School aquaponics class offers insight into not only how industry is helping to educate students agriculture and horticulture, but also how Seed Your Future is supporting those efforts and helping form the necessary connections between classrooms and industry. Stringer was in the first cohort of teachers to attend Seed Your Future’s Seed to STEM immersive professional development and the curriculum she developed is a direct result of that opportunity.
Educating and Experimenting with Aquaponics
Stringer constructed the aquaponics system at DuBois Area High School with the help of a PAsmart grant from the Pennsylvania Department of Education. The grant provided the school with an INTAG Aquaponics system that included a 250-gallon fish tank, a media bed of pea gravel and a float bed. It takes up a lot of space, but INTAG also offers classrooms carts with smaller aquaponic systems, which Stringer says she has seen colleagues successfully use. During this last school year, Stringer set it up and started growing with assistance from interested students.
Koi were placed in the fish tank and red wiggler worms were added to the media bed. Then it was time to start planting. Stringer experimented with all kinds of food: romaine lettuce, kale, butter crunch lettuce, spinach, sage, rosemary, basil, parsley, snap peas, nasturtium, strawberries, and grape tomatoes. Some were overwhelmingly successful (romaine and butter crunch lettuce, and parsley grew like crazy, Stringer said.) At the end of the school year, they had a sampling party where students got to try the various food, with some trying the various leafy greens for the first time.
Exposing students to new nutritious food was among beneficial outcomes. “They got extra credit if they ate it,” she said. Students also found the koi to be a calming presence, seeking out the tanks to come and feed the fish or just watch them, Stringer said.
Finding Industry Connections
Stringer’s lesson plans are filled with lessons in botany, geology and ecology, but also industry connections. Besides INTAG’s educational effort to build and run aquaponics structure, Stringer, who came to teaching from a previous career as a wildlife biologist, has plans for her students to understand how aquaponics translates into careers.
“There are things my students can look into with agriculture, horticulture, botany, and water quality that are going to be in high need in our country,” she explained. “We need more people to grow food and this is a technology that is being used for that.”
She wants to incorporate field trips and hearing from those working in the industry as well. Already she is connecting with a Maryland cut flower business, Floraponics, which is using aquaponics to grow flowers with the goal of creating more sustainability in floriculture.
Tom Precht, co-founder of Floraponics, said he is eager to share his knowledge with the next generation of scientists. A research scientist with a PhD in neuroscience, Precht began tinkering with aquaponics in his garage, later establishing the business in 2022. He claims to be the first floral farmer to grow Dahlias using aquaponics and published a research paper on it.
“The aquaponics technology is applicable to every crop,” Precht said. “We’ve figured some things out and learn enough that we are trying use this to disrupt the floral industry by showing flowers can be grown locally, using less water.”
He’s experimented with a number of flower varieties and found that sunflowers, zinnias and cosmos are the easiest. “They germinate 99% of the time and have a ton of seedlings,” he said. “Zinnias and cosmos just grow and bloom, you cut them back and they keep blooming. Sunflowers don’t grow back but they turn around in 60 days and are just easy crops to grow.”
On learning this, Stringer exclaimed she had a seed packet of zinnias in her classroom that she now knows will become a growing project for her students. The zinnia seeds are from the packets donated by W. Atlee Burpee Company to each of the teacher participants in Seed to STEM.
Stringer’s story is exactly the outcome Seed Your Future seeks to drive in connecting the classroom to the industry. Teachers can learn more about how to incorporate future careers in horticulture into their classrooms by checking out the resources at seedyourfuture.org, including information on educator grants, free webinars, and Green Career Week (Sept. 30 – Oct. 4). To stay up-to-date on the latest Seed Your Future news, join the email list.
For more information about Floraponics visit the website.
- Sarah Sampson is a contributing writer for Seed Your Future