Algaecides are chemical substances that are specifically used to control or kill algae. It is a strong algae depressant fully compatible with alkalizing and flocculating agents normally used in swimming pools. Algae growth is the main cause of colour in swimming pool water. Algaecides (or algicides) are used to control or suppress many species of planktonic, filamentous, and branched algae. Specifically that may be controlled or suppressed with algaecides include red macro-algae (Bangia atropurpurea), diatoms (Cyclotella cryptica, C. pseudostelligera and Stephanodiscus binderanus)2, and grass kelp (Enteromorpha flexuosa). Algae are microscopic plants and can be the most common, troublesome aspect of pool maintenance Algae can make your pool water cloudy and murky Even before algae is visible, it can clog your filter and increase chlorine demand Algae usually start in hard-to-reach crevices in the pool surface or areas of poor circulation You need algae protection the most when water temperatures rise. That’s why the middle of the swimming season is prime time for algae to develop. Our algaecides stay active in your pool water, with minimal loss of effectiveness due to water temperature, sunlight or swimming use.