growth and only 1/5 of the concerned EC, 3.5 mmho cm1, showing
that our aquaponics operated considerably satisfactory.
The increasing trend of BOD5 lessened in wk 3 when overall
average BOD5 inwk 3, 70.2 mg L1was not different from that inwk
4, 73.0 mg L1. Only until wk 4 when FF had effect on BOD5 that
6 d1 had 24% lower BOD5 than 2 d1. Also only until wk 4 PP had
effect on BOD5 that 24 h d1 resulted in 35% less BOD5 than 12 h d1.
Among several conditions that biofilter performs optimally the
BOD5 should be