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Nano-Tech Phosphree

Nano-Tech Bio-Media

Keep your water sparkling clean

Nano-Tech Phosphree is a polymer resin that is chemically stable and does not leak any metal ions into the water column unlike metal-based absorbents.

Nano-tech Phosphree

In contrast to other brands, Phosphree keeps your tank water clear and sparkling.

Other absorbents

Granular ferric oxide or GFO, not only clouds the water when used, but also leak small black colored particules into the main tank.


Phosphree is specially designed to absorb phosphate at a much slower pace compared to other metal-based absorbents, giving time for corals to acclimate to the reduction of phosphate in the water column.

Other brands

Rapid reduction of phosphate in the water column could stress out corals, and in the worst case scenario, may lead to Rapid Tissue Necrosis or RTN.

Comes in two sizes:

500ml / 17 fl oz

500 ml (17 fl oz) will remove 3 ppm of phosphate from a 2000 liters (528 gallons) marine/reef aquarium.

250ml / 8.5 fl oz

250 ml (8.5 fl oz) will remove 3 ppm of phosphate from a 1000 liters (264 gallons) marine/reef aquarium.

Lab Tests

To establish a controlled environment for Phosphate Absorption Rate Test, we’ve prepared three tanks with 100L of seawater, all containing 1.0ppm (±0.03) of phosphate.

※ Tank A: 100L of seawater with 60ml of Iron-Based Absorbent
※ Tank B: 100L of seawater with 60ml of Aluminum-Based Absorbent
※ Tank C: 100L of seawater with 60ml of Nano-Tech Phosphree
※ Photometer used to test for phosphate: Hanna HI97713 Phosphate Low-Range Portable Photometer

Step 1: Preparation of 100L of seawater with 1.0ppm phosphate content.

The tests cannot be conducted in an actual aquarium with livestock because phosphate is constantly generated by the animals. Hence we prepare the testing environment using Tricalcium phosphate.

We add 326.6mg of Tricalcium phosphate into 100L of seawater to bring the phosphate level to 1.0ppm (±0.03)

Step 2: Testing procedures

  1. We place 60ml of the absorbents into the testing tanks, with medium water flow provided by a Gyre pump.
  2. Three (3) water samples from each testing tank were collected every 24 hours for 8 days, we take the average reading of the three water samples.

Step 3: Results