HYDROS Control X3-S

The HYDROS Control X3-S is a standalone aquarium monitoring controller with a dedicated salinity probe port, built for reef and marine setups that need pH/ORP plus conductivity tracking in one unit.

• 2 Sense Ports (temperature, water level, leak, flow, and switch inputs)
• 1 Probe Port for pH/ORP with digital galvanic isolation
• 1 dedicated Salinity/conductivity Probe Port
• 2 Command Bus ports for power and data to other HYDROS devices
• Dual-core 32-bit processor; IP65-rated housing

Galvanic isolation on the probe inputs keeps stray tank current from skewing pH, ORP, and salinity readings — a common accuracy problem on cheaper controllers — while the dual-core processor keeps automation rules running locally even if the cloud connection drops. This SKU is the controller only: it monitors and alerts on its own, and adds outlet control for lights, pumps, and feeders once paired with a HYDROS XP8 power strip or WiFi Smart Plug.

Includes: X3-S controller only — power supply, mobile app account, and probes are sold separately.

Compatible with: HYDROS Control 2/4 Power Supply; HYDROS XP8 or WiFi Smart Plug (for outlet control); HYDROS pH/ORP and salinity probes; other Command Bus devices.

At Marine Concept Supply, all sales are final. Due to the sensitive nature of live animals and aquatic products, we do not accept returns or exchanges under any circumstances. Please review your order carefully before completing your purchase. No Cancellations.

If you have any questions or concerns about your order, please contact us at shop@marineconceptsupply.com and we’ll do our best to assist you.

We Ship UPS and will send tracking as soon as the item ships. 

Return shipping for any approved warranties are not covered and will be subtracted from the approved credit total.

Restock Fees apply to some products, due to their size or a manufacturer policy.Each product with a restock charge is marked online, in the description.

Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right