They say the best things come in small packages.
This exciting product from AZOO is only available in 15ml bottles but then you only need 2 drops to 100 litres and it gets rid of the worst algae of all, that nasty surface dwelling brush/beard stuff, without damaging the plants.
For use in enclosed aquariums only. An effective formula for assisting with maintanance of pristine conditions in an aquarium. Allows aquarium plants to flourish. Does not affect nutrient uptake and does not harm fish. Water change and fertiliser application etc can be continued during use.
Directions: Add 2 drops per 100 litres of water each day for 14 days while maintaining a 30% water change every 4-9 days. Change 50% of the water after 14 days.