Hydros Control X2 Fittings Use this arm only with

Use this arm only with the larger ReefLED 160 and ReefLED G2 170 fixtures

Can operate without an Apex when used with the optional Neptune PS-DC24 power supply

up to 5 times the normal dose may be used

This keeps heat-producing components out of the water

and modular sump expansion potential

Hydros Control X2 Fittings Use this arm only withHydros Control X2 The Hydros Control X2 is a compact general purpose HYDROS aquarium controller designed for freshwater and saltwater systems that need reliable monitoring, basic automation, app based alerts, and expandable control without moving into a larger controller right away. With two Sense Ports, two 12V Drive Ports, two Command Bus ports, and support for compatible HYDROS WiFi devices, the Control X2 is a strong starting point for aquarium