Seachem Flourish Phosphorus is a concentrated phosphate (PO4) fertilizer designed for freshwater planted aquariums to support healthy aquatic plant growth and prevent nutrient deficiencies. Ideal for high-light planted tanks and CO₂-injected systems, this nitrate-free phosphorus supplement helps maintain balanced macronutrient levels for stronger roots and vibrant foliage.

Key Features:
• Phosphate (PO4) fertilizer for freshwater planted aquariums
• Nitrate-free formula will not raise NO3 levels
• Supports balanced nutrient ratios for healthy plant growth
• Suitable for nano to large planted tanks
• Compatible with comprehensive fertilization programs

Dosage:
• 5 mL per 20 gallons (76 L) raises phosphate by approximately 0.05 ppm
• Dose 2–3 times weekly or as required based on phosphate test results
• Monitor PO4 levels to maintain proper nutrient balance

Compatible With:
• Freshwater planted aquariums
• High-light aquascapes
• CO₂-injected systems
• Not suitable for marine or reef aquariums