Algicides-Synthetic or natural chemical compounds used to kill or control unwanted algae (`cide` means killer).
Algicides, sold for pond use, control both green water-discolouring algae and filamentous growths.
- Chemical algicides are available but must be used correctly to avoid harming fish and plant life; follow label directions.
Small amounts of algae are good for ponds, providing food for fish. But when algae takes over, it can be unsightly and harmful, choking out other aquatic life. Chemical algicides are available to control algae blooms, ...
 See also: Light, Gardening, Water, Plant, Algae
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