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Test Kit 2 in 1 Test Kit Blue #752

NOTE: Store kits in a cool dark place.
1. Fill test cell to line with water taken from a depth of 18" (away from return line.
2. Add 5 drops of pH solution to the pH cell.
3. Add 5 drops of OTO solution to the CL cell.
4. Place cover over both cells and invert several times to mix.
5. Compare each cell.

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