Aeration can increase dissolved oxygen in a pond, supporting the growth of certain bacteria and leading to a more diverse and healthy bacterial community. It can also mix and circulate the water, distributing bacteria throughout the pond. The specific effects on bacteria will depend on the pond's characteristics and conditions.
Chemicals like algaecides & herbicides play a crucial role in managing aquatic environments, controlling algae/weed growth, improving water appearance, & promoting biodiversity. However, their use is reactive & limited. Proactive approaches like aeration, natural methods & fish are more sustainable.