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Table 1 Growth conditions in each recirculated aquaculture system (RAS) populated with either Tilapia or Clarias

From: Comparison of two commercial recirculated aquacultural systems and their microbial potential in plant disease suppression

Cultivation factors RAS with Tilapia RAS with Clarias
Temperature 21 0 C 20.9 0 C
pH 7.7 8.5
Conductivity** 130 mS cm-1 180 mS cm-1
Ammonium content 2.1 mg / liter 1.8 mg / liter
Nitrate content 280 mg / liter 188 mg / liter
Nitrite content 0,59 mg / liter 0,18 mg / liter
Fish weight 40-600 g per tank 100-4000 g per tank
Feed composition 37 % protein + 10 % fat 44 % protein + 12 % fat
Daily amount 5 times 18 times
  1. ** Electrical conductivity