Salifert Potassium Reef Test

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Salifert Potassium Reef Test Approximately 40 Tests Made in Holland Approx. 40 Tests Accurate Fast Potassium concentration in natural seawater is approximately 400ppm. Many aquaris ts have reported that low potassium value reduces colours in corals. This can be corrected in by increasing the potassium value to the normal natural value. Measures in approx. 10 ppm increments. Show more