presents the monthly inputs of water, feed and energy required to produce 1 kg of crops in a small-scale raft aquaponics system. An average of 104 L of water, 0.5 kg feed, and 56 kWh energy was needed to produce 1 kg of crops. The most efficient season for converting feed to plant biomass was the spring where 1 kg of fish feed was converted into 5 kg of plants, which were mainly leafy green crops such as chard, lettuce, and kale. Others have reported as much as 9 kg of lettuce grown using 1 kg of fish feed