Seachem PhosNet Bagged – Phosphate & Silicate Remover (50g)

Seachem PhosNet is a premium-grade granular ferric oxide (GFO) designed to rapidly reduce phosphate and silicate levels in aquariums. Its high porosity and surface area allow for superior binding capacity compared to standard GFO products, making it more efficient and longer lasting.

This 50g version comes pre-packed in a fine mesh media bag, making it easy to use in canister filters, sumps, hang-on-back filters, or any high-flow area. PhosNet is ideal for controlling nuisance algae, improving coral health, and maintaining pristine water conditions in both freshwater and marine environments.

Key Features:

• Removes phosphate and silicate without leaching
• High-capacity GFO – binds up to 1.41 mg/g PO₄
• Less dusty than competing products – easier to rinse and use
• Pre-bagged for convenience – no additional filter bag needed
• Safe for all fish, invertebrates, and plants

Product Specifications:

• Brand: Seachem
• Weight: 50g (pre-packed in mesh bag)
• Form: Granular Ferric Oxide (GFO)
• Country of Origin: United States

Directions for Use:

• Use 50g for every 200 L (50 US gallons) of saltwater or 400 L (100 US gallons) of freshwater
• Place in a high-flow area of the filter – do not allow to tumble
• Leave in place for 4 days, then test phosphate/silicate levels
• Replace if levels remain high; otherwise, continue use until levels rise again
• Do not overdose – continuous use of small amounts is more effective