During the three experiments (Table 2), fresh
water added to the fish tank was on average
0.445, 1.233 and 0.275 m3 d1 or 15, 41 and 9%
water volume per day. During tomato experiments, a total of 49.17 m3 or 0.734 m3 d1 of
fish water was used to irrigate the soil cultures,
which explains the higher water consumption in
the second experiment