Red Sea Phosphate/PO4 Pro Test Kit - 100 Tests

Read 2 Reviews Write a Review

In Stock: Buy now and your order will ship the next business day

This item is in stock in our East and West Coast warehouses



Add to Wishlist


Red Sea

Red Sea’s Phosphate Pro Test Kit is an advanced colorimetric test with comparator, measuring the level of phosphate in your reef aquarium to an exceptionally high accuracy of 0.02ppm PO4.

Phosphate Pro Test Kit, when used in conjunction with the Nitrate Pro Test Kit, enables accurate dosing of Red Sea’s NO3:PO4- X (Biological Nitrate and Phosphate reducer) which is part of the complete Red Sea Reef Care Program.

Red Sea’s Phosphate Pro Test kit includes a durable, chemical resistant plastic case and analytical grade glass vials.

Phosphate Pro Test Kit package size/volume: 100 tests

Product Manuals & Documentation

Red Sea Phosphate/PO4 Pro Test Kit - 100 Tests

Owner's Manual available for download in Adobe PDF file format

Manufacturer Info

With a dedicated team of scientists and other professionals, Red Sea is widely recognized as a leading innovator and manufacturer of quality products for aquarium hobbyists. Red Sea constantly strives to provide hobbyists of all levels with highly effective solution-driven products designed to make your fish-keeping experience as enjoyable and successful as possible.

The embodiment of Red Sea’s dedication to providing solutions for today’s reef-keepers is its range of MAX-NANO, MAX-E & MAX-S aquariums- The only choice for true Plug & Play™ coral reef aquariums, now featuring the very latest in LED lighting technology.

For advanced reef-keepers the Red Sea REEFER provides a great platform into which you can add your own selection of hardware. With its ultra-clear glass, ATO built-in, silent flow valve and superb quality of finish the REEFER sets the standard for those wishing to customize. REEFER is also available as a Deluxe version with LED lighting included.

Red Sea’s unique Reef Care Program (RCP) provides a comprehensive, safe and easy to use program for testing and supplementing within reef aquaria, and is perfectly complemented by Red Sea’s Coral Pro & Red Sea Salt’s, which has become the salt of choice for those seeking the very highest quality water quality for their coral reef aquariums. Both salts are made using a unique natural process which delivers unrivalled homogeneity and is perfect for delicate corals. Check your individual bucket of salt’s composition using Red Sea’s innovative new “MyBatch” software.

Whatever your aquatic needs, Red Sea delivers high quality innovative, solution based products.



Experience Level: Intermediate

Doesn't seem reliable

I've used this test on my reef tank (sps/lps/softie) and I don't think the results are accurate. I followed the instructions to the letter but everything I've tested comes out .08 ish. My tank = .08, di/ro water in my storage bin =.08, water straight out of my RO/DI =.08 (reads 0 tds on my meter also fyi). I'm reading it under flourescent lights which I believe are "soft white" ~2700k. They recommend 6500k lights. Not sure this is really the problem but who wants to change the lights in the house if it's required for testing???

2 out of 2 found this review helpful

Was this review helpful?



Experience Level: Intermediate

Good low-range kit

This kit is very good down to the 0.10 ppm range, but under that point the colors (similar shades of light yellow/green) are very difficult to interpret. This test takes about 8 minutes to perform, with 2 solutions, and 17 ml of aquarium water. It is easy to use and the results are consistent (partly due to the volume of water allowing for minor variations in droplet sizes). The color is light yellow when 0.00 ppm, increasingly more green from 0.02 to 0.36 ppm, dark green at 0.64 ppm, and dark blue at 1 ppm and higher. The colors for 0.0 ppm and for 0.16 ppm and higher are very easy to read, but the steps from 0.02 to 0.08 ppm are very difficult to distinguish. If you need to fine tune phosphate levels in the range below 0.10 ppm, then you need a different test kit. For what it's worth, you can also perform a High Range test by diluting 2 ml of aquarium water with 15 ml of RO water for results of 0.17, 0.34, 0.68, 1.36, 3.06, and 5.44 ppm. Anything higher than that is dark blue. I like that the color is based on a side-by-side comparison of one vial of unmixed aquarium water to one vial of mixed aquarium water, so any color or turbidity within the aquarium water is taken into account.

5 out of 5 found this review helpful

Was this review helpful?