Siso Algae Removal Moss combats algae DNA. Its effect lasts for 72 hours. It is made from natural and non-toxic materials. It is not used with probiotics. Product attributes: Remove and prevent algae growth such as hairy algae, beard algae, brown algae, blue-green algae, black brush algae and others. Harmless to fish, water plants and nitrifying bacteria. It can be applied directly within the aquarium to various waters without any side effects on the condition of the water