Phos-Block Phosphate Remover

AQUANATURE PHOS BLOCK is designed to eliminate both ionic & chemically bound phosphate in marine/reef aquariums. PHOS BLOCK has an extremely high capacity to bind large quantities of phosphate quickly, making it an excellent choice for removing phosphate from aquarium water when phosphate level is unusually high. It is more economical to use than granular media. In reef aquariums PHOS BLOCK is a practical way to help maintain the low phosphate levels needed to promote rapid growth of corals. Use PHOS BLOCK when dissolved phosphate level is above 0.2 mg/L and slowly dose enough to bring the level down to about 0.1 mg/L over a period of days. When the phosphate concentration is below 0.1 mg/L it is less effective. and that may result Phos reducer liquid remaining in the aquarium water. At 0.1 mg/L, use PHOSX to absorb phosphate and maintain levels below 0.03ppm.

CAUTION: Do not use with freshwater crustaceans including shrimp, crabs, and lobsters.


  • To Algae Control & Nutrient Removal

Shake well before use. Push 4 times Equal to (5 ml) per 20 US gallons (80 L) of aquarium water will remove up to 1 ppm of dissolved phosphate. over the course of several hours or days, and only into a filter sock to trap the precipitate formed. Do not add more than this amount per day, even if phosphate level is higher than 1 ppm. PHOS BLOCK binds dissolved phosphate and forms an insoluble precipitate in the water,which causes cloudiness. For this reason, the best way to use PHOS BLOCK is to dose it drop-wise into a filter sock located on a drain or water feed line. The filter sock acts as a mechanical filter to trap the fine precipitate. A 5-micron filter sock will trap the precipitate so that it does not cloud the aquarium. NOTE: some alkalinity is lost when controlling phosphate with an GFO or phosphate binder. Always monitor and supplement alkalinity when using them. Repeat dose every three days until algae is controlled. Not safe for use with snails, shrimp.

Use AQUANATURE BACTO MAX for bacteria colony OR AQUANATURE CARBON removes more Discoloration, Odors & Impurities for Sparkling Clean Water.

Store in a cool,dry place.

Keep out of reach of children. Not for human consumption. seek medical attention
immediately. If in eyes, flush with water, if irritation continues, seek medical attention.


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