Algae development will cause all conditions except?

Algae development in aquatic environments typically leads to several noticeable conditions that can have implications for water quality and management. The correct choice highlights that while algae can contribute to the other listed effects, a rapid fall in pH is not a typical consequence of algae development.

When algae proliferate, they generally consume nutrients such as nitrogen and phosphorus, which can lead to reduced water clarity due to increased biomass. As algae die and decompose, this decomposition process can lead to an increase in chlorine consumption when these waters are treated for disinfection, since higher organic loads require more chlorine to achieve effective sanitation.

Additionally, algae often produce a slimy growth that can coat surfaces and affect water aesthetics, making it harder for recreational use or affecting equipment and infrastructure in water bodies.

In contrast, the pH of water can be influenced by various factors, but a robust algae bloom typically does not result in a rapid fall in pH. In fact, some algae species can even elevate pH levels during photosynthesis, particularly in clear water bodies where they thrive. Therefore, the indication that algae development will cause a rapid fall in pH is incorrect, making this the right choice for the question presented.