Pond Boss Forums INTRO Questions & Observations Where'd the algae bloom go?

tecman = I think the slight oil slick is from stirring the bottom sediments which usually contain oils from dead plants including phytoplankton. Stirring or mixing the sediments during raking or removing pondgrass usually disrupts sediments and releases nutrient reserves trapped in the sediments. Nutrient reserves can stimulate a rapid growth of microalgae. I think the green film on the surface and associated bubbles is a microalgae growth. Bubbles are from either oxygen from plants or gases from sediments and they get temporarily caught in the algae surface film.

AHomeIN - Several days of cloudy weather can in certain conditions help suppress phytolankton blooms. Numerous combinations of variables can affect phytoplankton blooms.