Choose your answer before opening the explanation. This is a learning exercise, not a competency assessment.
Ammonia at the end of Phase I is about:
- 8 to 10 ppm
- 80 to 100 ppm
- 800 to 1,000 ppm
- 8,000 ppm
See the answer and why
800 to 1,000 ppm DMR gives 800 to 1,000 ppm after Phase I. Ten ppm is the spawning limit.

