Question

Lila observed that a pond with clear water was covered up with a green algae within a week. Why

Answer 1

The most common reason a pond would turn green is due to algae. First, let it be said that algae in a pond is not necessarily bad. In fact, a healthy thin layer of algae growing on the inner surfaces of the pond is an important part of a healthy pond. It can help prevent a high level of nitrates from building up in the pond water by consuming the nitrates as food and giving off oxygen in the process. On the other hand, algae can also be a real problem.