Standard Grade ORP Probe - PRBORPS are accurate and long-lasting, and designed specifically for Neptune Systems Apex Controllers.
ORP is the oxidation reduction potential.
Buy this probe if you are:
- You measure ORP in your aquarium with an Apex System or a PM1 module
- Replacing a worn out ORP probe (we recommend you replace your Standard Grade ORP probe every 12 months).
- Adding another tank to your system, want to measure ORP in it, and purchased a PM1 to do so.
- Want to have a back-up probe on hand