For an indoor, vertical setup you’ll want fast‑growing, high‑light tolerant microalgae. Chlorella vulgaris is a classic choice – it grows quickly, tolerates a range of light intensities, and is easy to harvest. Scenedesmus obliquus also does well in vertical photobioreactors, especially if you can maintain a steady CO₂ supply. If you can keep the water slightly saline, Dunaliella salina can add salt‑tolerance and is great for high‑lipid production. For a more “kelp‑like” feel, Ulva lactuca (sea lettuce) can be grown on racks, and it thrives under moderate light and regular nutrient feeding. Mixing a couple of these species can give you resilience and higher biomass yields. Remember to monitor pH, temperature, and nutrient levels closely – those systems can be sensitive to small changes.

Great, here’s a quick verbal sketch: start from the north wall where the CO₂ line runs. Run the light strips in parallel rows, each row 1 m apart. Assign the first two rows to Chlorella, the next row to Scenedesmus, and then a dedicated corner on the east side for the Dunaliella tanks. Keep the Chlorella and Scenedesmus racks at a 2:1 density, with the Dunaliella corner slightly separated so you can tweak salinity without disturbing the others. Make sure each zone gets the same light intensity, and place a pH sensor at the midpoint of each rack to monitor the 7–8 range. Temperature sensors every 2 m along the corridor will help you stay within 25–28 °C. That layout should give you clear zones, easy access for maintenance, and a steady CO₂ supply from the north wall. Good luck hitting those biomass targets before trivia!