Red Sea Trace-Colors Manuel Utilisateur page 10

8 | Red Sea | Reef Care Program
4. Wait 15 minutes for the color in the vial to stabilize.
5. Move the vial between the designated positions on the color card, look into the vial from
above and compare the color in the vial to the colors on the card. Choose the Iron level that
gives the closest color match and if necessary estimate an intermediate value.
6. The color in the reaction vial will remain stable for 5 minutes. Do not relate to the color in
the reaction vial after this time.
Directions for Potassium Pro Test Kit
1. Prepare the filtration kit as follows:
a. Lay a clean dry filter paper (II) above the funnel (III)
b. Place the top cylinder (I) on the filter paper and push down, trapping
the filter paper between the cylinder and the funnel
c. Place the assembled filter onto the filter cup (IV)
2. Using the large syringe provided, place exactly 2 ml of the water to be
tested into one of the glass vials.
3. Add exactly 3ml of RO or distilled water to the 2 ml water sample.
4. Add 4 drops of Potassium Pro Reagent A, close the vial with the cap and
shake for 15 seconds.
5. Using the 1ml syringe provided, add exactly 0.5ml of Potassium Pro Reagent B to the vial,
close with the cap and shake for 15 seconds.
6. Wait for 10 minutes (use a stopwatch) and then pour all of liquid from the glass vial into
the top of the filter.
7. Wait (approx 7 minutes) until at least 3ml of clear liquid has collected in the filter cup
(above the line), remove the filter and dispose of any remaining liquid. Using the 5ml syringe
take exactly 3ml of the filtered clear liquid from the filter cup and put it into the
2nd glass vial.
8. Add 2 drops of Potassium Pro Reagent C and mix gently. The test sample will now have the
titration start color as shown on the instruction card.
I
II
III
IV