The present study demonstrated that the tilapiae water spinach
raft aquaponics we used in this study was extremely effective in
fish waste treatment and also water conserved. In 4 weeks’ production
period, only 3.3% water was lost due to vegetable leaf
transpiration and minor evaporation. Consequently, water consumption
for fish productionwas exceptionally low, 20.0 L kg1. No
fish died. Overall average weight gainwas 43.9% for fish and 169.0%
for plant. Water quality remained safe and stable. Furthermore, as
expected the extending photoperiod and increasing feeding frequency
increased both fish and plant production and lessened the
accumulation of nitrogen and phosphorus nutrients inwater. These
findings are valuable and applicable in the development of aquaponics
and biological waste reuse