Fritz Phosphate Test Kit

The Fritz Phosphate Test Kit is a liquid reagent test that measures phosphate in both freshwater and saltwater aquariums. The box contains 150 tests and reads from 0 to 10 ppm. See all of our water testing supplies.

What's in the Box

• 2 reagent bottles, 1.25 fl oz (37 mL) each
• A test tube
• An instruction card with color chart

Why Test Phosphate

Fritz explains that phosphate enters the aquarium through fish food, tap water and the breakdown of organic matter, and is also produced by the metabolism of fish and other inhabitants. Small amounts are beneficial, but elevated levels can lead to excessive algae growth and reduced oxygen availability. In reef systems, high phosphate inhibits calcification and interferes with coral skeleton formation. Very low phosphate can limit nitrifying bacteria, and aquatic plants need phosphate to grow.

How to Test

1. Fill the test tube to the 5 mL line with aquarium water.
2. Add 6 drops from Bottle #1, then cap the tube and shake gently to mix.
3. Add 6 drops from Bottle #2, then cap the tube and shake for 5 seconds.
4. Wait three minutes for the color to develop, then match it against the color chart.

Keep test solutions out of the aquarium and follow the full instructions in the box.

Reading Your Results

Fritz recommends 0.05 to 0.1 ppm phosphate for freshwater aquariums and 0.03 to 0.05 ppm for saltwater aquariums.

• To reduce phosphate, Fritz recommends partial water changes and FritzZyme Turbo Clean.
• To raise phosphate, Fritz recommends Fritz pH Neutralizer, a high-phosphate supplement or food, or water changes with tap water that is high in phosphate.

Specifications

Related Fritz Tests

• Fritz Nitrate Test Kit to track the other main algae nutrient.
• Fritz Calcium Test Kit for reef tanks.

FAQ

What phosphate level should I aim for?
Fritz recommends 0.05 to 0.1 ppm for freshwater aquariums and 0.03 to 0.05 ppm for saltwater aquariums.

How many tests are in the box?
150 tests, as printed on the box.