HYDROS Blenny Smart Aquarium Controller with 4 Dosing Pumps

The HYDROS Blenny is a full HYDROS aquarium controller with four micro-dosing pumps built into the case. One compact box doses two-part, trace elements or additives on a schedule, reads up to four sensors, powers and monitors two 12 V accessories, and joins the rest of a HYDROS system over the Command Bus or Wi-Fi, all managed from the free HYDROS app. It is the step up from the two-pump HYDROS Minnow and works on freshwater and saltwater tanks alike. Add sensors such as the Triple Optical ATO Kit and browse the rest of our additives and supplements to fill the dosing containers.

Why You'll Love It

• Four independent dosing pumps: run alkalinity, calcium, magnesium and a trace or nutrient blend from one unit, each on its own schedule.
• A real controller, not just a doser: four universal Sense Ports read temperature, leak, flow, level, TDS and other HYDROS sensors, so the same box can top off, alarm and shut things down.
• Two 12 V Drive Ports with current monitoring: power DC accessories directly (1.5 A each, 3 A total) and let the controller warn you when a pump stalls.
• Grows with the system: two Command Bus ports chain to other HYDROS controllers and power bars, and Wi-Fi links up to 8 HYDROS devices in one collective.
• Reversible, color-coded heads: each pump runs forward or backward at three set speeds, and the color-matched tubing keeps four lines straight.
• Built for a fish room: IP65 sealed case, engineered and supported in the USA.

Dosing Details

Each head is a micro-liquid peristaltic pump with set speeds of 25, 45 and 55 mL per minute in either direction. Calibrate each line once with the included beaker, then schedule doses by volume in the app; the controller spaces them through the day and keeps a log. Tubing is 3 mm inside by 5 mm outside diameter, and four 10 foot lengths are in the box.

Specifications

What's Included

• HYDROS Blenny controller with four dosing pumps
• Power supply
• Four 10 ft color-coded dosing tubes
• Calibration beaker

Recommended Pairings

• HYDROS Triple Optical ATO Kit, turn the Blenny into an auto top-off as well
• HYDROS Leak Detection Sensor, a cheap safeguard for a dosing station
• HYDROS Dual Inline TDS Sensor, to monitor your RO/DI from the same app
• HYDROS Command Bus Cable, to link it to another HYDROS controller or power bar
• HYDROS Control XS Starter Kit, for switched AC outlets alongside the doser
• HYDROS Minnow, the two-pump version for smaller systems

FAQ

Do I need another HYDROS controller to use it? No. The Blenny is a complete controller on its own. It also joins a larger HYDROS collective if you already have one.

What can I dose with it? Two-part alkalinity and calcium, magnesium, trace elements, nutrients, liquid foods and carbon sources. Give each additive its own head and line.

Can a head pull water instead of pushing it? Yes. The pumps are reversible, so one head can be set up for small automatic water changes or to drain a line.

Is there a monthly fee? No. The HYDROS app and cloud access are free.