| 1 | The caustic waters breed a blue-green algae called Spirulina. | |
| 2 | Blue-green algae growth in a pond can cause a type of poisoning which may result in the death of the horse. | |
| 3 | Formerly called blue-green algae, cyanobacteria were traditionally treated as ALGAE. | |
| 4 | The cyanobacterium organism was chosen because it has a high demand for these two metals which are required for proteins involved in photosynthesis. | |
| 5 | That history began with the origin of the primitive, unicellular aquatic algae of the Precambrian Eon. |