Keep your water in check by replacing and re-calibrating your pH sensor every year. This sensor makes sure your water is just right, not too basic and not too acidic.
1x pH Probe
Please also purchase:
1x 4.0 Calibration Sachet
1x 7.0 Calibration Sachet
We also recommend purchasing a Calibration Kit to extend the life of your probe. This kit includes cleaning supplies and multiple calibration sachets.