Salifert Kalium/Potassium test
Salifert Potassium Reef Test kit: Salifert Potassium is the latest chemical measuring tool from one of the stalwart test kit companies on the reef aquarium block. According to Salifert, the Potassium reef Test can be performed in about 90 seconds. This tritatic test kit has a sharp color change, going from yellow to blue, when you hit the level in the sample. The Potassium Reef Test Kit’s resolution is 15 ppm giving you a pretty accurate read, but most of all you’ll love the discrete color change.
Manual for the Salifert Potassium Reef Test: Potassium concentration in natural seawater is approximately 400 ppm. Many aquarists have reported that a low potassium value reduces colors in Corals. This can be corrected by increasing the potassium value to the normal natural concentration. For that purpose, Salifert Potassium extra ""