HYDROS pH 4.01 Calibration Fluid



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HYDROS Single-Use pH Calibration Solution Packets

Most Hydros pH controllers and monitors require two reference points to ensure the accuracy of the pH of the instrument is measuring. It is recommended to utilize calibration solutions that are in the opposite spectrum that corresponds to the pH level you want to measure. In reef tanks, where the pH range is usually 7.8-8.5 the best choice is to make use of the calibration solution 7.0 as well as 10.01. For calcium reactors in freshwater aquariums and saltwater tanks with a pH that is usually lower than 7.0 and above 7.0, you should to make use of 4.01 and 7.01 to calibrate the probe. 4.01 pH - AThe low threshold read that your pH controller or monitor requires for calcium reactors for saltwater aquariums. solutions that are below 7.00 pH, as well as the majority of freshwater aquariums. The calibration packets can be kept in a dry, cool area for up to a year.
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Under $25
0.02 lbs
5 × 0.2 × 0.2 in


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