anchor: The red macroalga, Champia parvula, test is acceptable if survival is 100 percent, and the mean number of cystocarps per plant should equal or exceed 10.
positive: The red marcoalga, Champia parvula, test is an acceptable test if there is 100% survival and at least 10 cystocarps per plant.
negative: The red macroalga test is a useless metric because plants always pass it.