Water parameters
Optimum water levels, shrimp and fish.
The reference we keep at the counter, typed out from the lab report the shop was given. Two columns, because shrimp and fish do not want the same water.
18 parameters, shrimp and fish
| Particulars | Unit | Shrimp optimum | Fish optimum |
|---|---|---|---|
| Water chemistry | |||
| pH | — | 7–8.5 | 7–8.5 |
| Salinity | ppt | 5–25 | 0 |
| Carbon dioxide (CO₂) | ppm | 20–40 | 20–40 |
| Bicarbonate (HCO₃⁻) | ppm | 100–120 | 150–500 |
| Total alkalinity | ppm | 150–250 | 150–500 |
| Total hardness | ppm | According to salinity | According to salinity |
| Alkaline hardness | ppm | 200–300 | 200–300 |
| Magnesium (Mg²⁺) | ppm | According to salinity | According to salinity |
| Calcium (Ca²⁺) | ppm | According to salinity | According to salinity |
| Potassium (K⁺) | ppm | According to salinity | According to salinity |
| Nitrogen | |||
| Total ammonia* | ppm | 0.4–1 | 0.4–1 |
| Unionized ammonia* | ppm | 0–0.1 | 0–0.1 |
| Nitrite (NO₂⁻) | ppm | According to salinity | According to salinity |
| Other readings | |||
| Iron (Fe) | ppm | 0–1.0 | 0–1.0 |
| Hydrogen sulfide (H₂S)* | ppm | 0–0.4 | 0–0.4 |
| Dissolved oxygen (DO) | ppm | 4–10 | 4–10 |
| Chlorine (Cl₂) | ppm | 0–0.3 | 0–0.3 |
| Temperature | °C | Not specified | Not specified |
Values transcribed from the supplied lab report. Treat them as reference, not as safe operating targets. Keep unionized ammonia and hydrogen sulfide as close to zero as possible, and confirm species-specific targets with an aquaculture professional before you treat.
The report's table did not give an optimum temperature, so no range is printed here.
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