Back to all questions Pool Questions - Alkalinity Find Questions By Category Alkalinity Chlorine Cloudy-murky water Dealing with Animals in the Pool General Green Water and Algae Inflatable Pools Metal Contaminants and Metal Ionizer Disinfectants pH Pumps, Filers, and Vacuums Safety and Health Salt Pools Stains Winterizing and Solar Blankets When I test my pool with a test strip the alkalinity shows a dark green color is that high or low that color isn’t on the box. Categories: Alkalinity My test strip shows green color for alkalinity is that high or low. Reading there is no indicator for that color. Categories: Alkalinity