To increase the C/N ratio in these materials, pine bark (particle size
10-35 mm) from a local sawmill were added. The various materials were spread in a trapezoidal pile 2 m wide at the
base, 1 m high and 6 m long, with a total final volume of 10 m3
. To avoid lixiviation and nutrient washout, the pile
was set on an impermeable base and sheltered above. The proportion of fish, seaweed and pine bark was 1:1:3.