Particles of microorganisms are transported in the air, and you cannot avoid them getting into the pool water. Environmental conditions, such as heat, heavy rains and heavy use of the swimming pool, also affect the formation of deposits.
Apply an anti-algae agent to the pool walls and bottom before filling the pool with water and continue to add the agent to the water regularly. This is how you prevent algae growth. Algae inhibiting weekly dosage: 0.5 dl KlarPool/10,000 liters of water.