PH 7.0 Buffer Solution 150ml Calibration Fluids - Aquarium PH Meter Controll?er

PH 7.0(±0.02 / 25?) buffer solution 150ml / Calibration Fluids **Compatible for all PH Probe** *Why should we know PH range? PH value shows the acid or alkaline state of water (PH value equals 7 is neutral, it is alkaline as PH value is greater than 7, and acid as PH value is less than 7), most of the fish can adapt to life in water around PH=7, but many species have special water preferences. Such as: species of PH < 7: Discus, Amazon cardinals, preferences for PH = 6.0 to 6.5. species of PH > 7: Marine fish and African cichlids, preferences for PH = 8.4 and 7.5 to 8.0. *The right PH ranges keep the fish right!