API Phosphate PO4 Freshwater & Saltwater Aquarium Test Kit, 150 count

By API
Rated 4.4444 out of 5 stars
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$13.99Chewy Price
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$19.59Chewy Price
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About This Item

  • Helps maintain a healthy aquarium by allowing you to measure and control phosphate levels.
  • Frequent testing is recommended to ensure your tank is healthy for your aquarium life.
  • Prevents potentially harmful algae and green water blooms in fresh water.
  • Promotes the growth of hard corals in salt water.
  • Kit includes two bottles of liquid test reagent, two-color cards, glass test tube and information on how to correct water condition.
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Help keep your aquarium in tip-top shape with API's Phos-Zorb filtration pouch.

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Customer Rating
Rated 4.4444 out of 5 stars
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Rated 4.6667 out of 5 stars
6
Rated 5 out of 5 stars
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Rated 5 out of 5 stars
1
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$13.99Chewy Price
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$12.25Chewy Price
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$11.64Chewy Price
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Fish TypeTropical Freshwater, Marine Fish, Betta...Tropical Freshwater, Marine Invertebrate, GoldfishTropical Freshwater, Marine Fish, Betta...Tropical Freshwater, Marine Fish, Betta...Tropical Freshwater, Marine Fish, Betta...
Aquarium TypeFreshwater, SaltwaterFreshwaterFreshwater, SaltwaterFreshwater, SaltwaterFreshwater, Saltwater

Questions & Answers

1 Customer Questions

Can this be used to test swimming pool water?
Answer by Chewy • Jul 04, 2021
This test kit is designed to measure phosphate levels in aquariums.

ReviewsWrite a Review

4.4
Rated 4.4444 out of 5 stars
9 Reviews
89%
Would recommend to a friend
1
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2
11.1111
11%
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22.2222
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9 Customer Reviews

Rated 5 out of 5 stars
By Huffnpuff on Apr 26, 2022

Very easy to use

This test is very quick and accurate. Will definitely buy again.

Rated 5 out of 5 stars
By Goldfish on Dec 24, 2021

API test product

I received this product right away as it was needed to find out why I keep getting black beard algae in my aquarium.

Rated 5 out of 5 stars
By 1234 on Jan 22, 2021

Accurate phosphate aquarium testing.

I checked the tap water and the aquarium water. Both tests showed normal phosphate levels. Therefore, the algae bloom is probably not caused by excess phosphates in the water.

Rated 2 out of 5 stars
By Sheila on Mar 16, 2020

Very leaky test tube

I'm sure it tests for phosphates as advertised. I'm not a chemist or have other means to test for it, so I'll trust what the test says. However the cap for the testing tube is nowhere near leak proof. As part of the test process they want you to shake the vial vigorously 2 different times. I couldn't even tip it to the side holding it still without it leaking let alone shake vigorously without slinging chemically treated water all over. I tried it 4 times, once while testing, then three times with tap water. I would think they would have the vial be water tight, I mean that is the business they're in- water testing. Maybe my standards are too high. Maybe I got a bad cap. Whatever the reason, the world keeps turning.

Rated 4 out of 5 stars
By allieazalea on Jun 26, 2020

I have leaky tube too

Great for measuring phosphate levels for any kind of water

Rated 4 out of 5 stars
By Mango on Feb 10, 2019

Aquarium water chemistry tests

I have algae growing everywhere in my tank so I have started testing for all kinds of elements. I rated this product 4 stars instead of 5 stars because the test itself is a little difficult to read. I need to count the drops of reagent and judge color. It is not a black and white test. Otherwise the product is outstanding

Rated 5 out of 5 stars
By BonnieBlue on Sep 22, 2017
Top 100 Contributor

Great test kit!

A necessity for testing my pond! Delighted that Chewy carries this!

Rated 5 out of 5 stars
By sherri on Sep 9, 2017

fish supplies

The product is great. Luckily we are into fish tanks because the glass tube came broke but no biggie.

Rated 5 out of 5 stars
By AEjr on Nov 18, 2016

Phosphate test kit

It is ez to use, comes with instructions on how to use and color chart that way you can see your phosphate leave.