Seachem PhosNet GFO 125g – Phosphate & Silicate Remover for Aquariums

Seachem PhosNet (GFO) 125g is a high-capacity granular ferric oxide filtration media designed to rapidly and permanently remove phosphate and silicate from freshwater and saltwater aquariums. Elevated phosphate and silicate levels can lead to persistent algae growth and poor water quality—PhosNet helps maintain ultra-low nutrient levels for healthier aquarium systems.

With its high porosity, large surface area, and strong binding capacity, PhosNet outperforms many competing GFO products. It will not release absorbed nutrients back into the water and produces significantly less dust, making it cleaner and easier to handle. The 125g size is ideal for medium to large aquariums or extended use.

Key Features:

• Rapidly removes phosphate and silicate
• Synthetic granular ferric oxide (GFO)
• High porosity and superior binding capacity
• Reduces nutrients to very low levels
• Will not leach phosphate or silicate
• Low-dust formulation for easy handling
• Safe for freshwater and saltwater aquariums
• Ideal for reef tanks and algae control

Seachem PhosNet GFO 125g delivers powerful and reliable phosphate and silicate control for aquarium systems. Its strong binding capacity, low-dust design, and non-leaching performance make it an excellent choice for reef keepers and freshwater aquarists seeking long-term nutrient management.