• To control algae, add one piece per 20L or one complete block per 120L of water.
• This block is best used as a preventative or when algae first appears or after cleaning an algae infested aquarium
• Blocks will dissolve over 7-14 days depending on water conditions and circulation
• If possible control the amount of sunlight or artificial light to reduce the growth of algae
• Repeat only when algae reappears
• To prevent oxygen depletion, remove heavy algae growths mechanically before treatment and aerate the water after use
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