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of the surface and throws it into the air where it picks up atmospheric oxygen ... submerged aeration typically uses air bubbles that are released below the ... quality of the lake surface aeration is excellent in an emergency it can quickly put a ... use submerged aeration systems in an emergency as the oxygen put in is diluted ... the lake bottom aeration would have no effect on the rooted plants but it can have a ... profound effect on the algae depending upon many ... from surface aerators to synergistic airlifts put oxygen into the water between the ...

organic matter often measured with an electrode and electronic meter orthophosphate ... of the littoral zone and vertically it ends at the aphotic zone periphyton ... that stimulates plant and algal growth eutrophication is often caused by an excess of ... of a lake where light levels are high enough to stimulate photosynthesis ... plants and algae convert the sun s energy to chemical energy water and carbon ... from a single point or source e.g pipes from an industry or wastewater ... a unit of measure of concentration e.g used to express nutrient or ... or by an organism or group of organisms e.g the amount of fish productivity in a ...