Ph teststripe for vatn.3 stk

3 pieces Test Strips to Determine Water Hardness, Use: Immerse test strip into water sample (not in running water) for about 1 second shortly after removal (after about 1 minute), the test field coloration indicates hardness as follows: each red colored area corresponds to 5 ° dH. Hardness range 1: 00 – 04 ° dH 0.0 – 0.7 mmol / l Ca: very soft 2: 04 – 08 ° dH 0.7 – 1.4 mmol / l Ca: soft 3: 08 – 12 ° dH 1 , 4 – 2.2 mmol / l Ca: medium hard 4: 12 – 18 ° dH 2.2 – 3.2 mmol / l Ca: medium – hard 5: 18 – 30 ° dH 3.2 – 5.4 mmol / l Ca: hard 6: over 30 ° dH over. 5.4 mmol / l Ca: very hard