Hydrion pH Test Paper Roll
Hydrion Insta-Chek pH Paper comes in a convenient plastic holder that contains a 15 foot roll of ph test paper, enough for about 1000 pH tests.
Although a general purpose pH test paper, Insta-Chek pH Paper is widely used for agricultural and hydroponics testing.
Simply tear off a small strip of pH paper, dip into your nutrient solution, then instantly compare the resulting color with the matching pH color chart.
Hydrion Insta-Chek pH Paper gives you an accurate pH reading in the range of 4 - 9 units.
A distinct color is assigned for each full pH unit (4.0, 5.0, 6.0, 7.0, 8.0, 9.0) so matching your results is easy.