System (fish size) Temperature ºC Dissolved O2 mg/L Dissolved CO2 mg/L Alkalinity mg/L as CaCO3 TAN mg/L NO3-N mg/L NO2-N mg/L TSS mg/L cBOD5 mg/L
Single-pass (0.5-130 g) 12.9 ± 0.1 9.5 ± 0.2 18.4 ± 0.3 266 ± 3 0.31 ± 0.01 3 ± 0 0.01 ± 0.00 4.5 ± 0.3 1 ± 0
Fully-recycle H Fully-recycle La (130-1400 g) 13.2 ± 0.0
13.2 ± 0.1
10.0 ± 0.0
10.0 ± 0.1
9.3 ± 0.1
9.0 ± 0.4
226 ± 1
214 ± 1
0.29 ± 0.00
0.48 ± 0.05
12 ± 0
70 ± 4
0.04 ± 0.01
0.10 ± 0.00
2.7 ± 0.1
6.4 ± 1.2
2 ± 0
6 ± 1
Partial-reuse (1400-5000 g) 12.9 ± 0.0 11.0 ± 0.1 13.6 ± 0.3 263 ± 1 0.24 ± 0.01 2 ± 0 0.01 ± 0.00 1.1 ± 0.1 0 ± 0
aRainbow trout were raised in both the high (H) and low (L) water flushing treatments.
Table 3: Water quality (mean ± standard error) in the culture tanks during each phase of the 26-month growth period
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