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
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.