INSTA-TEST MAGNESIUM TEST STRIPS 25/BTL

The one-dip Insta-TEST^® Magnesium strip makes the testing process easy with just one dip of the strip into a pool or spa before matching the reaction to a color chart (0-400 ppm) on the bottle. This one of a kind test strip offers stable color development with very distinct colors. Packaged 25 strips per bottle.