API Phosphate Test Kit for Freshwater And Saltwater Aquariums
API Phosphate Test Kit for Freshwater And Saltwater Aquariums
UPC: 317163120637
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The API Phosphate Test Kit is an easy-to-use, economical aquarium phosphate test kit for monitoring your water. It reads from 0 to 10 ppm and works in both fresh and saltwater aquariums, with separate color charts for each.
Key Features
- Test range: 0 to 10 ppm (mg/L) total phosphate
- About 150 tests per kit
- Freshwater and saltwater color charts included
- Childproof safety caps on the test solution bottles
Why Test for Phosphate?
Phosphate enters the aquarium from fish and invertebrate waste and decaying organic matter, such as dead algae and uneaten food. Water treatment facilities may also add phosphate to tap water to prevent pipe corrosion and reduce heavy metals. Excess phosphate can cause a cloud or tint in the water and frequently leads to algae and green water blooms. In saltwater aquariums, phosphate precipitates dissolved calcium (Ca²⁺) and magnesium (Mg²⁺), inhibiting the growth of hard corals and other reef-building organisms.
How to Use This Phosphate Testing Kit
Read the directions thoroughly before testing, and do not allow test solutions to get into the aquarium. To remove the childproof cap, push the red tab left with your thumb while unscrewing the cap with your other hand.
- Fill the test tube to the line with 5 mL of water.
- Add 6 drops from Bottle #1, holding the bottle upside down and completely vertical.
- Cap and shake vigorously for 5 seconds.
- Add 6 drops from Bottle #2 the same way. This solution is very thick and may need extra pressure.
- Cap and shake vigorously for 5 seconds.
- Wait 3 minutes for full color to develop.
- Match the tube against the correct color chart, viewing it against the white area in a well-lit spot. The closest match is the ppm (mg/L) of total phosphate. Rinse the tube after each use.
Use the Freshwater chart for freshwater aquariums with added salt and for ponds.
Reading Results and Reducing Phosphate
API recommends a phosphate level of zero in both saltwater and freshwater systems. Phosphate in a new aquarium depends on the purity of your source water, tap water levels can vary daily, and phosphate tends to accumulate in established tanks.
- Ongoing control: use a phosphate-absorbing media such as Phos-Zorb or GFO
- Fast reduction: remove dirt and uneaten food, then change 25% to 50% of the water depending on concentration
- Cleaner source water: use RO/DI filtered water to keep copper and other contaminants out