Interactive Experience
The Living Loop
How Floor 318 feeds thousands from fish, plants, and compost
Beneath Mel's hands-in-the-dirt intuition runs a closed-loop aquaponics system — three nested cycles operating at different time scales, monitored by AI, feeding an entire floor of Arcology One.
Minutes to hours — The water cycle: fish excrete ammonia, bacteria convert it to nitrate, water recirculates through grow beds and back.
Water Savings
90%
vs. traditional farming (3 L/kg vs 250 L/kg lettuce)
Arizona State University; FriendlyAquaponics
pH Sweet Spot
6.8–7.2
bacteriological optimum; too low kills nitrifiers, too high precipitates phosphorus
Multiple peer-reviewed studies, 2024-2025
Safe Ammonia
<1 mg/L
functional limit 3.2 mg/L before fish stress
Frontiers, 2025