There are many different types of algaecides on the market, so it can be difficult to choose the best one for your needs. Here is a rundown of the most common types of algaecides and their benefits:
Copper-based algaecides: Copper is a natural element that is toxic to algae. Copper-based algaecides are effective at killing all types of algae, including tough strains like blue-green algae. They are safe for use in ponds and aquariums, but can be harmful to plants if used in high concentrations.
Quaternary ammonium compounds (QACs): QACs are man-made chemicals that work by disrupting the cell membranes of algae cells. This causes the cells to burst and die. QACs are very effective at killing all types of algae, but can be harmful to fish and other aquatic creatures if used in high concentrations.
Polyquat algaecides: Polyquats are another type of man-made chemical that work by binding to the cell walls of algae cells and preventing them from taking in nutrients. This starves the cells and eventually kills them. Polyquats are effective against all types of algae, but can be harmful to fish and other aquatic creatures if used in high concentrations.