Hardness

Carbonate hardness

Non-carbonated hardness

20 ppm

Total hardness

Agricultural lime

Toxic materials

Eutrophication

Heavy metals like lead mercury and cadmium

Weeds and algae

Chemical control

Biological control

Mechanical control

Environmental control

Below 17°C

18°C

27°C

Below 20°C

28°C to 29°C

Tilapia

Fry

3–10 mg/L, 6–8, 50 to 250 mg/L

65–80°F, 3–10 mg/L, 6–8, 50–250 mg/L

28–31°C, 3–7 ppm, 7–8.5, Less than 10 parts per thousand, 25–60 ppm, Less than 2.0, Less than 10, 30 – 1.50 ppm