Product Overview:

WaterWell Black Out 1LT is an effective algaecide specifically formulated to combat challenging and persistent algae infestations in swimming pools. This product is ideal for pools that have been neglected or have not maintained regular checks of pH and chlorine levels, leading to difficult algae problems, including black spot algae.

Key Features:

  • Specialized Algae Treatment: Designed to target and eliminate stubborn black spot algae.
  • Highly Effective Formula: Potent concentration for efficient algae eradication.
  • Broad-Spectrum Algaecide: Capable of treating both green and black algae, while also preventing their future growth.
  • Treatment Capacity: Suitable for treating up to 40,000 liters of pool water with a 1-liter bottle.

Usage and Application:

  1. Water Balancing: Ensure the pool water’s pH levels are balanced, ideally between 7.2 and 7.8.
  2. Dosage Guidelines: Apply 250ml of Black Out per 10,000 liters of pool water.
  3. Even Application: Distribute the product evenly around the pool while the filtration system is operating.
  4. Filtration: Run the pool filter for at least 24 hours after application for effective distribution and algae treatment.
  5. Ongoing Monitoring: Regularly check algae levels and reapply as necessary to maintain a clear pool.


  • Rapid Algae Clearance: Quickly clears stubborn algae blooms, restoring the pool’s clarity.
  • Preventative Measures: Inhibits the recurrence of algae, ensuring long-term pool cleanliness.
  • Enhanced Water Quality: Promotes a safer, more pleasant swimming environment by eliminating algae-related health risks.
  • Equipment Protection: Prevents algae from causing blockages or damage to pool filtration systems.


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