These figures belong to the named source and method. Historical costs are not current quotations. A value without its stage, material basis or measurement location is not a farm instruction.
| What is measured | Value and basis | Source and limitation |
|---|---|---|
| Ammonia after Phase I | 800 to 1,000 ppm | ICAR-DMR manual, 2011. Measured before Phase II, alongside pH 8.2 to 8.5 |
| Ammonia limit at spawning | 8 to 10 ppm | ICAR-DMR manual, 2011. DMR: normally not more than 8 to 10 ppm at spawning |

