Copper may exist in natural waters and effluents as a soluble salt or as suspended solids. A small amount is essential for plants and animals, and concentrations exceeding 0.1 mg/L are useful for controlling algae and plankton growth. Quantities ranging from 0.02 to 0.1 mg/L are toxic for some fish, so its use for treating fish disease requires careful monitoring. Range: 0.1 – 4 mg/L; contains 100 tests.
| Case Style | B |
| Method Name | Color disc/Bicinchoninate |
| Model | CU-5 |
| Model | CU-5 |
| Number of tests | 100 F |
| Parameter | Copper (free) |
| Parameter | Copper – As free Cu |
| Platform | Color Disc |
| Range | 0 – 4 mg/L Cu |
| Smallest Increment | 0.1 |
| Standard Range | 0 – 4 mg/L Cu |
| What’s included? | Includes one reagent, color disc, comparator box, two viewing tubes, instructions and carrying case. |

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