ELOS Expert Line Aqua Test - PO4

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:
- Shake each bottle before use.
- Fill testing vial to 10ml using syringe.
- Add 2 drops of Reagent A.
- Add 2 drops of Reagent B.
- Close vial with stopper and shake for 2 minutes.

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