During the three experiments (Table 2), fresh
water added to the fish tank was on average
0.445, 1.233 and 0.275 m3
d
1
or 15, 41 and 9%
water volume per day. During tomato experiments, a total of 49.17 m3
or 0.734 m3
d
1
of
fish water was used to irrigate the soil cultures,
which explains the higher water consumption in
the second experiment. Water consumption
in the first and third experiment was only due to
water evaporation in aquaponic, the lower consumption by cucumbers being related to the production period in late autumn versus aubergine
production in summer.