Especially useful in hydroponics, this Hydrion pH Paper provides excellent color separation in both the acid range (below pH 7) and the alkali range (above pH 7).
The color chart has pH matches at [5.5][5.8][6.0][6.2][6.4][6.6][7.0][7.2][7.4][7.6][8.0]
Each roll provides for approximately 100 tests
tear off a small strip of pH paper, dip into the test solution, then
instantly compare the resulting color with the matching pH color chart.