This block is designed to clear algae from aquariums and ponds by naturally inhibiting nutrients like ammonia & nitrogen.
Assist in the process of algae control by growing aquarium plants & keeping the biological load of fish under control (via filtration & water changes). It is also beneficial to keep aquariums & outdoor ponds out of direct sunlight.
This block will dissolve more rapidly in rain water and will start to work in about 3 days in 500L, and 4-7 days in aquariums up to 1500L.