The NYOS Phosi-Ex phosphate adsorber effectively removes excess phosphate (PO₄) from saltwater and freshwater aquariums. Formulated from ultra-pure granules, it provides fast, efficient, and long-lasting phosphate control—helping prevent nuisance algae and promoting vibrant coral coloration and healthy biological balance.
Powerful phosphate removal: Rapidly binds and reduces PO₄ levels
High-purity granules: Free from contaminants and safe for reef use
Long-lasting media: Maintains efficiency over extended contact time
No clumping or disintegration: Stable granule structure for consistent flow
Easy to use: Works in media reactors, filter bags, or canister filters
Reef-safe: Does not leach harmful substances or alter water chemistry
Volume: 500 mL
Treatment Capacity: Up to ~1,320 gal (5,000 L) depending on PO₄ load
Active Ingredient: Granular ferric oxide (GFO)
Usage: 100 mL per 265 gal (1,000 L) recommended starting dose
Aquarium Type: Marine and freshwater
Manufacturer Part # (MPN): NYO-PHOSIEX-500
Reducing phosphate to prevent algae growth
Maintaining ULNS and balanced nutrient levels in reef aquariums
Use in reactors (e.g., NYOS Torq G2) or filter bags for efficient media flow