Code: 20134

Seachem PhosGuard 500ml


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Rapidly removes phosphate & silicate from marine and freshwater aquaria

• Spherical for optimal hydrodynamics

• Irreversible binding

• Suitable for marine and freshwater use

PhosGuard™ rapidly removes phosphate and silicate from marine and freshwater aquaria. It is not recommended for phosphate buffered freshwater. PhosGuard™ is highly porous for high capacity and bead-shaped for optimum water flow.

In recent years, there has been speculation that aluminum oxide based phosphate removers like PhosGuard™ release aluminum into the water and subsequently damage corals. Seachem has carried out extensive research into this and found that in experiments using three times the dose of PhosGuard™, even soft-bodied corals remained unaffected. Click here for more information on this.

Directions: Pre-wet by adding to a double volume of freshwater, followed by a rinse. (NB: May generate heat on initial contact with water.) For best results, PhosGuard™ should be rinsed before use and placed so as to maximize the flow of water through it but not so that it tumbles against itself in flow. It may be used in a canister filter, media chamber, box filter, or any high flow area of a trickle filter. Use of a filter bag is recommended. Use 85 mL (1/3 cup) for every 200 L (50 US gallons) saltwater or 400 L (100 US gallons) freshwater.

Leave product in place for 4 days, then test phosphate or silicate concentrations with either MultiTest™: Phosphate or MultiTest™: Silicate. If the concentration of the component you are trying to decrease has not dropped to around 0.02 mg/L, then replace the PhosGuard™, otherwise leave in place until levels begin to climb again. As long as concentrations remain under control, the product is not exhausted. Over treating is not recommended. PhosGuard™ is not an exchange resin and does not release anything into the water. It does not leach phosphate or silicate back into the water and may be removed, dried, and returned to service until exhausted. Continuous use of small quantities is better than intermittent use of larger quantities.

Quantity: 500ml

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