Neptune Systems Apex Systems - EB832, Temp Probe, Salinity Probe, Double Junction Lab pH & Lab ORPNeptune has put together a package that included the salinity, temp, pH and ORP probes, along with WiFi connectivity all in a single package. The Apex Controller is by far one of the most advanced dedicated aquarium controllers on the market today. The wide variety of controllability with the Apex Controller System and its easy to use cloud interface makes it a perfect option for a fully automated reef tank. The Apex Controller has two different