EasyCare AlgaTec is made to quickly and effectively make algae more susceptible for chlorine to sanitize and kill the algae. It's an industrial strength algaecide that brings your pool a powerful cleanup for fast killing of all types of algae growth. AlgaTec is meant to kill and control all types of algae including green, yellow and black types. This algaecide clarifies your pool water while removing algae, leaving your pool clean and clear. EasyCare AlgaTec Algae Remover is the strongest and fastest acting algaecide available