S/N

Parameter

Recommended values for aquatic life

01

Temperature

24˚C - 31˚C

02

Dissolved oxygen (mg/L)

Not below 4 ppm/mg/L

03

Turbidity (cm)

Clear water (30 cm depth)

04

TDS (mg/L)

Less than 1000 mg/L

05

TSS

>100 - <220 mg/L

06

pH

6.5 - 8.5

07

Total hardness

50 - 300 ppm/mgL

08

Alkalinity

50 - 200 ppm

10

Nitrate concentration (mg/L)

Less than 250 ppm/mg/L

12

Ammonia

Less than 0.05 ppm/mg/L

13

Iron

Less than 0 - 1 ppm

14

Lead

Less than 0.02 ppm

15

Hydrogen sulphide

Less than 0.003 ppm

16

Copper

Less than 0.0 ppm

17

Zinc

Less than 0.1 ppm