Seachem Flourish Potassium 100ml

Seachem Flourish Potassium is a highly concentrated potassium supplement designed to support strong, consistent plant growth in planted aquariums. Potassium is naturally consumed over time in closed aquarium systems, and low levels can result in yellowing leaves, weak growth, and other deficiency symptoms. Regular dosing helps maintain healthy, vibrant plants.

Unlike many alternatives, Flourish Potassium is derived from potassium sulphate, not potassium phosphate or potassium nitrate. This means it contains no nitrogen or phosphorus, helping you avoid unwanted algae blooms. With a concentration of 50,000 mg/L, each bottle goes a long way. It’s available in multiple sizes, from 50 ml to 500 ml, making it easy to choose the right amount for your setup.

Key Points

• Highly concentrated source of potassium for planted aquariums
• Prevents potassium deficiency and supports strong plant growth
• Derived from potassium sulphate—contains no nitrogen or phosphorus
• Helps avoid algae issues linked to phosphate or nitrate-based supplements
• Extremely concentrated (50,000 mg/L) for long-lasting use
• Available in multiple bottle sizes to suit all aquarium keepers

How to Use

• Add 1 capful (5 ml) per 125 litres of aquarium water
• This raises potassium levels by approximately 2 mg/L
• Dose 2–3 times per week, or as needed based on plant health

Signs of Potassium Deficiency

• Chlorosis (yellowing leaves)
• Necrosis (brown or dying tissue)
• Pinholes in leaves
• Weak stems and roots