NEPTUNE SYSTEMS APEX TEMPERATURE PROBE ESV Aquarium Products Water testing is critical and

Water testing is critical and necessary for aquariums

Durable Casing

Precise control of water movement

G5 Diffusers custom-designed to fit G5 models only

super-sensitive leak detection probes and place them where you want that oh-so-important protection for your floors

NEPTUNE SYSTEMS APEX TEMPERATURE PROBE ESV Aquarium Products Water testing is critical andReplace your Temperature Probe, add one for another tank, or put one on your PM2 PM3 module for temperature compensated readings. Buy this probe if you are: Replacing an old probe. Adding another tank to your system via a PM1. Want to have more accurate readings on your PM2 PM3 modules by adding temperature compensation.