Qiuyu 7 in 1 Aquarium Water Test Strips 50pcs for Fish Water

1) pH: Ideally 6.8-7.6

2) Nitrite (NO2): Ideally 0 mg/L. 5 - 10 mg/L need to add nitrifying bacteria or filter media

3) Nitrate (NO3): Ideally 0 - 25 mg/L. 100 - 250 mg/L recommend to water change

4) Residual chlorine (CL2): Ideally 0 mg/L. May add anti-chlorine or increase aeration

5) General Hardness (GH): Ideally 25 - 120 mg/L

6) Carbonate Hardness (KH): Ideally 40 - 120 mg/L

7) Total chlorine (TCL): Ideally 0 mg/L

- Easy to use, just dip for 2 seconds!

- Light weight, portable to carry around easily

Unit: mg/L = ppm