Due to the high levels of humic matter, Tetra AlguMin biologically prevents the formation of unattractive algae. Tetra AlguMin promotes the biological balance and healthy plant growth.+ mild biological treatment for combating algae+ for use at the onset of algae problems+ broad-spectrum action to combat all frequently occurring types of algae+ contains humic substances as a natural anti-algae agentDosage Tetra AlguMin:Add 5 ml for every 10 litres of aquarium water. Repeat the treatment if required after 3-4 weeks.Application: Shake before use. Add liquid directly to water. Note: Protect product from sunlight. Activated carbon filtration impairs the effect. Switch off the UV clarifier. Ventilation required. Remove dead algae mechanically if possible.