Phosguard - 5.2 lb.

PhosGuard removes phosphate and silicate from marine and freshwater aquaria. Great for use in many applications, including power filters, canister filters, and wet/dry filters & sumps. It is not recommended for phosphate buffered freshwater. This product is highly porous for high absorption capacity and bead shaped for optimum water flow. It outperforms all competing products. PhosGuard is not an exchange resin, it does not release anything into the water.

For more information on controlling phosphates, please see our article How to Get Rid of Algae and our That Fish Blog post: Phosphates – Invisible Troublemakers in Ponds and Aquariums.

Proprietary metal oxide.

Directions: 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 (75 gallons*). 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 (150 gallons*) (i.e. will remove up to 30 mg/L phosphate in 600 L (150 gallons*) 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.

Caution! May generate heat on initial contact with water. Pre-wet by adding to a double volume of freshwater (e.g. 250 mL of product in 500 mL water), followed by a rinse.