Seachem PhosGuard is a high-capacity, spherical filter media designed to rapidly remove phosphate and silicate from both freshwater and saltwater aquariums.
 High Capacity & Rapid Removal: Spherical shape allows optimal water flow, maximizing contact to quickly bind excess phosphate and silicate.
 Algae Control: Helps prevent and control nuisance algae growth by removing its primary food source.
 Safe & Non-Leaching: Chemically binds phosphate permanently so it will not leach back into your water even when fully exhausted.
 Versatile Application: Ideal for use in canister filters, media reactors, power filters, or drip tray systems.
Usage Note: Rinse before use. For best results, place in a filter mesh bag in an area of high water flow. Monitor phosphate levels and replace once levels begin to rise again.