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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