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Table 6 Water quality parameters (Based on daily measurements)

From: Effect of water temperature on protein requirement of Heteropneustes fossilis (Bloch) fry as determined by nutrient deposition, hemato-biochemical parameters and stress resistance response

ParametersTemperatures (°C)
18 °C26 °C
Temperature (C)20.1 ± 0.326.2 ± 0.1
Dissolved oxygen (mg/L)7.1 ± 0.26.7 ± 0.4
pH7.6 ± 0.37.2 ± 0.2
Free CO2 (mg/L)5.7 ± 0.56.3 ± 0.5
Total alkalinity (mg/L)74.9 ± 0.775.6 ± 0.4
Total NH3-N (mg/L)0.02 ± 0.010.03 ± 0.01
Nitrite (NO2, mg/L)a
  1. Mean ± SD (n = 183). Recorded thrice daily at 07:00, 12:00, and 17:30 h
  2. aUndetectable