Bluelab Replacement pH Probe for Combo / Maestro Meters Media As stock is limited and

As stock is limited and won't be restocked by the manufacturer

Choosing between 60L and 80L depends on your plant count and system type:

Integration with FoxFarm base nutrients

and connect the other end to the AQUAvalve5

UV-C light

Bluelab Replacement pH Probe for Combo / Maestro Meters Media As stock is limited andBluelab Replacement pH Probe For Combo and Maestro Meters Best for: Bluelab Combo or Maestro meter owners whose original pH probe has been damaged, lost or has simply worn out. Our thoughts Probes are the one part of any pH meter that wears out eventually, however careful you are it's just how the sensor chemistry works. This replacement means you don't need to bin a perfectly good meter body just because the probe's had its day. If your original