5m ph alkaline acid test paper water litmus testing for gardening aquarium plant

scale read from 1 to 14: ootdty 1 -3 gives a very acidic substance 4-6 gives an acidic substance 7 gives neutral 8 -11 gives alkalinity 12 -14 gives a very high alkalinity ph 1-14 colour card in each package the test strip color change should be aligned with the ph-scale color map within approximately 15 seconds instructions: just press the test strip to test the object or liquid you test. half a second later, remove the paper and include the color card, compare the color change of th