The experiment had a factorial arrangement of 6 treatments,
namely, 3 feeding frequencies for red tilapia Oreochromis sp. X 2
photoperiods for water spinach I. aquatica Forsk. Illumination was
12 h or 24 h daily. An equal daily rationwas evenly fed to the fish 2,
4 or 6 times at 12-h, 6-h and 4-h interval, respectively. Each
treatment had 2 replicates or experimental units. The experiment
was completed in 4 weeks