Aquarium Auto Top-Off Kit: Triple Optical Water-Level Sensor and 50 GPH DC Micro Pump System

Keep evaporation from disrupting your aquarium’s normal operating level by turning a compatible HYDROS controller into an automatic top-off system.

The kit pairs a triple optical water-level sensor with a compact 12V pump, allowing the controller to replace evaporated water without another power brick.

A hang-on mount, 80 inches of tubing and a siphon break complete the water path from a freshwater reservoir to the aquarium or sump.

Key Features

• Three optical sensing points give the controller more water-level information than a single switch, supporting more deliberate operating and safety rules.
• The sensor contains no moving parts and is easy to clean, making regular aquarium maintenance straightforward when salt creep, algae or mineral deposits appear.
• Daylight and darkness operation allows discreet placement inside an aquarium stand or an all-in-one tank’s rear chamber.
• Magnetic coupling supports mounting on most clear, tinted or painted surfaces up to 1/2 inch thick, so the sensor can be positioned at the normal operating water level.
• The controller powers the micro pump through a compatible Drive Port, reducing extra cords and eliminating the need for a separate pump power brick.

Specifications

• Kit contents: Triple water-level sensor, DC micro pump, hang-on tubing mount, tubing and siphon break.
• Sensor connection: One compatible HYDROS Sense Port.
• Pump connection: One compatible HYDROS Drive Port.
• Compatible controller examples: HYDROS Control X2 and Control X4.
• Pump flow rating: Up to 50 gallons per hour.
• Maximum pump head pressure: 6 ft.
• Pump dimensions: 1.57 in L × 1.46 in W × 1.5 in H.
• Pump type: 12V brushless.
• Maximum pump power draw: 5W.
• Tubing length: 80 in.
• Tubing dimensions: 8.5mm outer diameter and 6.5mm inner diameter.
• Maximum supported mounting-surface thickness: 1/2 in.
• Intended liquid: Fresh top-off water.
• Installation: Route the outlet above the reservoir’s maximum water line and install the siphon break.
• Care: Clean the optical surfaces and pump when deposits, algae or reduced flow appear.

Pair the kit with a compatible controller that has an available Sense Port and Drive Port. Before unattended use, set conservative run-time and alert rules, then observe normal filling, low-reservoir and sensor-fault tests as part of a careful aquarium routine.