In this innovative, hands-on project, students explore the science and engineering behind aquaponics—a sustainable system that merges aquaculture (raising fish) with hydroponics (growing plants without soil). Their mission: to design, assemble, and maintain a functional aquaponic unit that grows lettuce indoors, powered by the natural cycle between fish waste and plant nutrients. Students learn how nitrogen, pH balance, water flow, and temperature affect fish health and plant growth. As they monitor and adjust their system, they gain a deep understanding of ecosystem balance, biology, water chemistry, and sustainable agriculture. Once operational, the system is exhibited in a living room-style display, reflecting how such technologies can be beautifully integrated into everyday life. This project fuses biology, environmental science, and design thinking—empowering students to build, care for, and present a working ecosystem that models real-world sustainable living.