Removes phosphate and silicate from
marine and freshwater aquaria. It is not recommended for phosphate buffered
freshwater. This product is highly porous for high capacity and beadshaped for
optimum water flow. It outperforms all competing products. PhosGuard is not an
exchange resin, it does not release anything into the water. 1 Liter easily
treats over 300 gallons.
Use 1 cup for every 75 gallons. Leave product in place for 4 days,then test
phosphate and silicate.