Hydros Control XD Tunze It is useful when the

It is useful when the sump water level is too high for the skimmer to tune properly

Seachem Stability for Aquarium Biofilter Support

Adjust flow as needed for the application

What you can expect from your HYDROS Smart Device

Hydros Control XD Tunze It is useful when theHydros Control XD The Hydros Control XD is a compact HYDROS aquarium controller built around direct 12V accessory control. With three Drive Ports, two Command Bus ports, a Power Port for added system redundancy, app based control, alerts, and HYDROS ecosystem compatibility, the Control XD is ideal for adding low voltage device control to a freshwater, saltwater, reef, pond, sump, or utility system installation. HYDROS Control XD Drive Port Controller