![pH Probe](http://shop.neptunesystems.com/cdn/shop/products/pH_Probe_DJ_2016_{width}x.jpg?v=1550621690)
pH Probe
PRBPHDJpH Probe- Double Junction
Replace your pH probe or add another for another tank, calcium reactor, etc.
Buy this probe if you are:
- Replacing a worn out pH probe (we recommend you replace your pH probe every 18 months).
- Adding another tank to your system and purchased a PM1 to do so.