Lets say your Apex system detects low dissolved oxygen in your aquarium, you could have pumps on standby waiting to be activated when levels hit below optimal as well as send you an email or text message

Add the Dissolved Oxygen Module: PM3 to your Apex Neptune System to allow continuous real time monitoring of your reef tanks dissolved oxygen levels.

• Real-time monitoring of dissolved oxygen in reef aquarium
• Module has extra Temp Probe port (sold separately)
• I/O Switch Inputs for ATO, feed buttons, leak alarms, etc.

Recommended DO level for reef tanks is between 4.5ppm – 7ppm

With so many additives that are hitting the market today, that focus on biological nutrient removal can easily and rapidly take up the dissolved oxygen in the tank leaving it very hard or nearly impossible for your fish and corals to breathe. If you employ any bacterial nutrient control system like biopellets, carbon dosing, or nitrate reactors it is a wise investment to purchase the PM3 and dissolved oxygen probe.

The PM3 module also has a bonus that it comes with an open port for a temperature probe and also another opening for an I/O switch port that would be used with the breakout box for monitoring float switches, magnet switches, and much, much more.

Features

• Monitor/Control Dissolved oxygen and temperature
• 6 digital inputs for float switches, water on floor sensors, pressure sensors, etc
• Plug and Play.  Automatically recognized when installed into the system
• Two AquaBus connectors for flexible expansion via AquaBus
• Comes with 3′ AquaBus cable
• Galvanic Isolation for accurate and reliable probe readings
• LED Status Indicator
• Upgradeable firmware
• Compatible with all Apex systems

Dissolved oxygen can easily be manipulated with either air pumps and air stones, aiming return nozzles at the surface of the water, or a water pump that vertically pushes the water to the surface to allow for gas exchange. In a typical reef tank, most O2 is lost and transferred with CO2 at the surface of the water. Another large sink for dissolved oxygen to be consumed is settled detritus, food, and other dissolved organic compounds. As the process breaks down organic compounds dissolved oxygen will be consumed. For overstocked tanks that can cause a huge issue as your animals will consume the oxygen as well as their waste which could lead to dangerously low levels of dissolved oxygen.