Neptune Systems Double Junction ORP Probe (PRBORPDJ) Airpumps Double Junction pH Probes are

Double Junction pH Probes are accurate and long-lasting

plastic and other smooth surfaces

A specialized tool that helps break up and remove mats

FRESH PACIFIC PILCHARD

Peter's Pro + Biotic contains a complex proprietary blend of aquatic pre and pro biotics

Neptune Systems Double Junction ORP Probe (PRBORPDJ) Airpumps Double Junction pH Probes areDouble Junction ORP Probes are accurate and long lasting, and designed specifically for Neptune Systems Apex Controllers. Double Junction ORP probes will hold calibration longer than lab grade probes. ORP is the oxidation reduction potential. This product will not function stand alone; it requires a Neptune Systems Apex Controller.