How to test phosphate using the Kyoritsu packtest

• Take one tube out of the bag with the blue label (Phosphates). Pull out the plastic pin. Squeeze out the air from the tube. 
• Holding the squeezed tube, put tube into your sample, releasing to suck water up (like a baster!) Your sample container should be half full.
• Invert at least 5 times, allowing the reagent to dissolve in your sample. Set your timer for 5 minutes.
• Compare your results to the comparison chart. If results are in between, record the half-way point.

Comparing results

Use the comparator provided with your kit and take your time. You're looking for if values are low/medium/high, rather than precision (not possible with this type of test)! Do not compare with a screenshot or photograph as lighting will make it inaccurate.

Interpreting results

Normal levels depend on your location. The following values apply to the UK:

• 0 - 0.02 ppm: Low/Normal
• 0.02 - 0.1 ppm: Medium
• 0.2 - 0.5 ppm: High
• 0.5 - 1 ppm: Very high

Watch the protocol in action