PRODACtest PO4 - Phosphate

Water test kit for measuring the phosphate concentration (PO4) - suitable for fresh and marine water aquaria

Phosphate is not toxic. However, an excess of phosphate can promote strong algae growth under certain circumstances. On the other hand, aquatic plants and the zooxanthellae of corals in seawater need a minimum amount of phosphate to function. With this test you will be able to determine whether there is a need for action.

Phosphate test set Instructions for use

  1. Rinse the sample test tube several times with the water to be tested and then fill with sample water exactly to the 10 ml mark *
  2. Add 5 drops of reagent 1 and shake
  3. Add one level spatula of reagent 3 and shake again
    If phosphate is present in the water, the sample will change color. After 5 minutes you can read the concentration
  4. Compare the color of the sample with the color card by holding the test tube close to the color that seems most similar to you and looking through the tube from above
    For good results, it is best to use daylight (no direct sunlight)

* The meniscus of the water surface has to exactly touch the 10 ml calibration line.


Clean the vial after use, close the reagent bottle tightly and store in a cool, dry place away from light.
Keep out of reach of children!

Phosphate is one of the most important nutrients for aquarium plants. Please follow the instructions given with our fertilizer Eudrakon P for the recommended concentration. Phosphate enters the tank mainly via the fish food and possibly the tap water (the respective waterworks can provide information on the PO4 concentration of your tap water). In addition, peat, other natural products and certain preparations for aquariums can contain considerable amounts of phosphate.
You can raise the phosphate concentration specifically with the phosphate fertilizer Eudrakon P or effectively lower it with the phosphate fixer Phosphareduc.


12 ml reagent solution 1, powder vial reagent 2 (1.1 g), spatula, glass test tube with sealing cap, color card

Sufficient for 48 tests

Possible Dangers


Signal word: Attention

0 of 0 reviews

Leave a review!

Share your experiences with other customers.


Eudrakon P Phosphate Fertilizer
For heavily planted and illuminated basins with low fish population.

Variants from €6.99*
Single-use Syringes PE/PP with Luer Plug Connection
Disposable syringes PE/PP with Luer plug connection in different sizes

Variants from €0.50*
Disposable Pasteur Pipettes, graduated
For filling all standard pH tests and other tricky filling tasks

Phosphareduc Phosphate Fixer
Adsorber granulate on an iron (III) hydroxide base for the irreversible removal of phosphates from aquaria and pools

Content: 0.1 kg (€0.00* / 1 kg)

Variants from €4.95*

Similar Products

Zoobest Alpha Test Phosphate - PO4
Water test for the determination of phosphate (PO4) concentration in fresh and salt water. Up to 40 tests possible. Measuring range: 0.05 - 2 mg/l PO4-P


Water tests (Prodac)

Sold out
PRODAC Speedy Test 7 in 1 - 50 Test strips
Strip test for determining 7 water parameters.

PRODACtest Ca - Calcium
Water test kit for measuring the calcium concentration (Ca). For marine aquaria. The range depends on the measured values

PRODACtest Ca - Calcium - Reagent 3 Refill
Refill of Reagent 3 to PRODACtest Ca - Calcium

Sold out
PRODACtest Fe - Iron
Water test kit for measuring the iron concentration (Fe). Suitable for fresh and marine water. Allows up to 63 tests.

PRODACtest GH - Total hardness test
Determination of total hardness (TH). Suitable for fresh and sea water.

Sold out
PRODACtest KH - Carbonate hardness test
Determination of carbonate hardness (CH). For fresh and sea water.

Sold out
PRODACtest NH4/NH3 - Ammonium/Ammonia
Water test kit for measuring the ammonium/ammonia concentration (NH₄/NH₃). Suitable for fresh and marine water. Allows up to 65 tests.

PRODACtest NO2 - Nitrite
Nitrite concentration detection. For Fresh & Seawater. Max. 60 tests possible.

PRODACtest NO3 - Nitrate test
Water test to determine the nitrate concentration (NO3). Suitable for fresh and sea water.

Sold out
PRODACtest pH - Operating range 4.5 - 9.0
Determination of pH value. For fresh and sea water. Up to 130 applications.

Sold out
PRODACtest PO4 - Phosphate
Determination of PO4 concentration. For fresh and sea water. Up to 48 tests.


Enquiry form

Send us an e-mail. We look forward to hearing from you.

Request form
Fields marked with asterisks (*) are required.
Thank you for your enquiry. We have received your enquiry and will get in touch with you as soon as possible.