Phosphate Test Kit

Lighting Protein Skimmer Reef care Supplements Water Test Kits Salt und Sea Water Others

Water test kit PO4

 Water test kit


  • Professional, laboratory-controlled test kit for measuring the phosphate value of seawater

  • High yield, sufficient for at least 100 applications.

  • Easy handling due to clear color change

  • High Resolution (Accuracy): 0,01 mg/l.

  • Range: 0.01 – 0.3 mg/l.

  • Incl. multistandard

  • Refill Pack available

Measure the phosphate value at laboratory level

Our phosphate test is characterized by a particularly high sensitivity and accuracy. Extra-long test tubes result in a significantly higher layer thickness. This leads to improved color recognition and thus to a particularly lower detection limit. At the same time, the resolution in the low concentration range, which is of interest for Aqauristics, increases significantly. In addition, the enclosed PO4 standard allows verification of the function and durability of the phosphate test (To do this, add 0.1 ml of the PO4 standard to 35 ml ultrapure water (<0 μS) to prepare a reference solution containing 0.1 mg/l phosphate.)


Controlled safety

The production of our reef care products is subject to strict monitoring by our own laboratory. The quality assurance helps us in the selection of the purest raw materials and leads to end products in best quality. The accuracy of the phosphate test kit was also adjusted and tested in our laboratory.


Operating instructions (download)

If your operating instructions are lost or otherwise unusable, you will find the operating instructions as a replacement for download here. Simply click on the symbol (book), the instruction manual opens in a new window as PDF.

Hover your mouse pointer over the image of the test kit, to get further information about its components.

PO4 test kit open


Color chart

Color chart
(Operating instructions behind, also you can klick on the book icon above to download the instructions as PDF.)

5 ml Syringe

5 ml syringe
(To remove 5 ml sample volume from the completely filled titration tubes.)

1 ml Standard

1 ml Standard
(0,1 ml PO4 standard + 35 ml ultra pure water (< 0 µS) = reference solution with 0,1 mg/l PO4)

Titration tube 1

Titration tube 1
(e.g. for the blank)

titration tube 2

Titration tube 22
(e.g. for the sample. With spoon to add reagent PO4 1 into the sample.)

Reagent PO4 2

Reagent PO4 2
(Attention: corrosive!)

Reagent PO4 1

Reagent PO4 1
(Powder, not harmful.)


(Put both titration tubes into the comparator and afterwards the comparator on the color chart.)