The rectangular concrete tank was used in this system for
removal solid wastes. Dimensions of tank are 3 m long, 2 m wide
and 0.5 m high. The water volume used in each tank was 2.4 m3
.
Polyethylene sheets were used as a media for solids removal and
carry bacteria in the system to improve the water quality.
The hydroponic units in this study consists of three gullies
which made from concrete, lined by plastic sheet and covered with
foam boards to support the plants. Dimensions of this tank are
27 m long, 1.0 m wide and 0.5 m high with row spacing of 50 cm.
The solution was pumped from the tank to the upper ends of the
gullies. Small tubes were used to supply each gully with water
discharged of the fish farm in a closed system