German JBL Fish Tank 6 in 1 / 7 in 1 test stick water quality test test strip paper agent PH/NO2/NO3/GH/KH/CO2 - AliExpress
Fish Health & Wellness :: JBL Pro AQUATES PH 3-10, the pH wipe of the water can be read from 3-10, can be used for freshwater fish tank, wooden water tank, sea tank.