7.00 pH Calibration Fluid

Neptune Systems pH 7.00 Calibration Solution – Single Use Packet Keep your pH probe readings accurate with this single-use calibration packet. pH probes drift over time, especially in saltwater aquariums, compromising measurement reliability. This neutral-point solution is designed as the low reference in two-point calibration routines (typically paired with pH 10.0 solution) and works with Neptune Systems controllers and most aquarium monitoring systems. The foil packet ensures freshness and eliminates guesswork—simply tear open and apply. Calibrate standard probes every three months or double-junction probes every four to six months to maintain stable tank conditions and reliable automated dosing or CO₂ control. One packet per purchase.