Lo-Chlor Pool Algaecide is an excellent general-purpose algaecide that remains active in the pool water for 90 days. It is based on a low dose, organo copper complex, which is extremely effective and highly economical (1L treats up to 120,000 Litres pool water). It is effective in controlling all algae types. There is not a pool that won't benefit from this amazing product. Lo-Chlor Pool Algaecide is still the same formulation developed in the late 1970's originally known as Lo-Chlor Pool Conditioner. With its proven success over time Lo-Chlor Pool Algaecide remains pivotal in this range of specialised pool and spa treatments and remains the No.1 algaecide for long term algae prevention. 500ml treats 60,000 Litres pool water