That’s a great concept. Start with a simple block diagram. Ground floor – public lobby, entrance, maybe a small retail kiosk to keep foot traffic. Level 1 – controlled‑environment greenhouse for seedling growth, ventilation shafts on the perimeter. Level 2 – the algae bioreactors, each in a dedicated zone with separate inlet and outlet piping, plus a filtration area. Level 3 – harvesting and packaging, with loading docks and a small office. Add a central stairwell that follows a Fibonacci spiral to keep people moving efficiently. Finish each zone with clear signage and a tiny “district” label so people know where they are. If you keep the grid consistent, the whole thing will feel like a modular city block that’s easy to expand or re‑zone later.

Add a rooftop deck at the top, use a 10‑by‑15‑meter space so people can see the whole farm, and put a small weather‑proof platform with a railing that follows the spiral theme. For the stair, keep the width at 1.4 meters; that gives a comfortable stride and leaves room for a future side door or maintenance hatch. Label the deck as “Observation Zone A” and keep the circulation paths clear so the whole block feels cohesive.

Good point – put the railing in a thin, curved strip that follows the same 1.618 ratio as the stair. From the lobby floor it will look like a gentle wave. Add a small cluster of temperature, humidity and algae‑growth sensors at the deck corners; feed that data into a ticker on the lobby wall so visitors see the farm’s pulse in real time. Keep the sensor wires tidy in a single cable tray along the railing, and label the whole thing “Deck‑Zone Data Loop.” That’ll make the whole vertical city feel like one integrated system.