ELOS Expert Line Aqua Test - PO4 (Phosphate)

ELOS brand test kits have a good reputation and appear to be comparable to Salifert test kits.

I found the kit reasonably easy to use.

Instructions:

1) Shake each bottle before use.

2) Fill testing vial to 10ml using syringe.

3) Add 2 drops of Reagent A.

4) Add 2 drops of Reagent B.

5) Close vial with stopper and shake for 2 minutes.

ELOS Expert Line Aqua Test Chart - PO4 (Phosphate)

6) Hold vial about 5cm above the white chart. Looking down from above into open vial compare color to color chart.