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Aquarium Water Treatments / Phosphate / Seachem PhosGuard 2L

Seachem PhosGuard 2L

Item # 188


Rapidly removes Phosphate and Silicate


PhosGuard rapidly removes phosphate (responsible for unwanted algae growth) and silicate from marine and freshwater aquaria. Not recommended for phosphate buffered freshwater. PhosGuard is highly porous for high capacity and bead-shaped for optimum water flow.

  • Effectively removes phosphate from aquarium water
  • 1 litre of product to 1200 litres of water
  • Bonds to minerals such as Iron, an essential nutrient for healthy plants

Why is it different?

PhosGuard is spherical. Its shape allows for maximum water flow through the media. Granular phosphate removers can become compacted, dramatically limiting their capacity to remove phosphate. If the media canít come into contact with the water, it canít remove phosphate from it. PhosGuard is the only spherical phosphate remover on the market.


For best results, PhosGuard should be placed so as to maximize the flow of water through it. It may be used in a canister filter, box filter, or any high flow area of a trickle filter. In some situations it may be necessary to use in a filter bag. Use 250 mL (~1 cup) for every 300 L. 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. Each 500 mL of PhosGuard treats over 600 L (i. e. will remove up to 30 mg/L phosphate in 600 L of water, depending on the initial phosphate/silicate concentrations and the current biological load. Over treating is not recommended.

PhosGuard is not an exchange resin, it 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.


Earn 1000 points with this purchase
Other sizes/types
Seachem PhosGuard 1L
Seachem PhosGuard 1L
Rapidly removes Phosphate and Silicate
Seachem PhosGuard 4L
Seachem PhosGuard 4L
Rapidly removes Phosphate and Silicate
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