Seachem PhosNet GFO 50g – Phosphate & Silicate Remover for Aquariums

Seachem PhosNet (GFO) 50g is a high-performance synthetic granular ferric oxide designed to rapidly and permanently remove phosphate and silicate from freshwater and saltwater aquariums. Excess phosphates and silicates can fuel algae growth and compromise water quality—PhosNet helps maintain ultra-low nutrient levels for healthier aquatic systems.

Featuring high porosity and an exceptionally large surface area, PhosNet delivers stronger binding capacity than most competing GFO products. It will not release absorbed phosphates or silicates back into the aquarium and produces significantly less dust, making it easier and cleaner to use.

Ideal for reef tanks, marine systems, and freshwater aquariums, PhosNet provides reliable nutrient control when used in high-flow filtration areas.

Key Features

• Rapidly removes phosphate and silicate
• Synthetic granular ferric oxide (GFO)
• High porosity and high binding capacity
• Reduces nutrients to very low levels
• Will not leach phosphate or silicate back into water
• Produces less dust than most GFO products
• Safe for freshwater and saltwater aquariums
• Ideal for reef and algae-control systems

Seachem PhosNet GFO 50g is a premium phosphate and silicate removal media offering powerful binding, low dust, and long-lasting performance. Designed for serious aquarists, it delivers effective nutrient control without leaching, making it an excellent choice for maintaining clean, algae-free aquarium water.