Automatic Top‑Off System for Aquariums

🔍 High‑Precision Optical Sensor
Uses infrared light to detect water presence. The moment water drops below the sensor tip, the system triggers the pump. Resolution is better than 1mm—much more precise than any float switch.

🛡️ Dual‑Sensor Safety (On Select Models)
A two‑sensor configuration gives you backup protection: one monitors the refill level, the second acts as an emergency cutoff to prevent overflow. If the primary sensor fails, the secondary sensor stops the pump automatically.

💧 Smart Pump Control
The controller runs a small DC pump that draws from your fresh water reservoir. Pump flow rate is adjustable. Onboard logic prevents short‑cycling and stops the pump immediately once the water level is restored.

⚙️ Built‑In Safety Timers
An intelligent pump‑run timer detects abnormal operation. If the pump runs continuously beyond a safe period (e.g., 10‑15 minutes), the system shuts down and flashes an alert—preventing flood damage if a tube comes loose or the reservoir runs dry.

🧼 Easy to Clean & Maintain
The optical sensor has a smooth, non‑porous surface. A quick wipe with a soft cloth removes any algae or salt creep. No small float mechanisms to disassemble or replace.

🔌 Simple, Low‑Voltage Power
Runs on a safe 12V DC power supply (adapter included). Works with most aquarium controller systems if you prefer integrated control.

How It Works
1.Mount the optical sensor at your desired water level inside the aquarium or sump. The sensor tip must be positioned exactly where you want the water surface to stay.

2.Place the water intake tube from the pump into a separate freshwater reservoir (RO/DI water for saltwater tanks, dechlorinated tap water for freshwater setups).

3.Connect the pump to the controller, and plug the power adapter into a standard outlet.

4.Turn the system on. The sensor immediately checks the water level. If water is present, the pump stays off. If the water level is low, the pump runs until water reaches the sensor tip again.

5.That’s it. The system now works automatically, 24/7.

Applications
🐠 Reef Tanks (Saltwater)
Maintains stable salinity by replacing evaporated water with pure RO/DI. No more daily manual top‑offs, no more salinity swings that stress corals.

🌿 Planted Tanks (Freshwater)
Keeps CO₂ concentration and filtration stable. Prevents heater exposure and pump noise when water level drops.

🐡 Large Aquariums & Fish Rooms
Saves hours of manual labor each week. One system can be used across multiple tanks with additional sensors and pumps.

🏡 Home & Office Aquariums
Set it and forget it. Perfect for vacation periods—your tank stays stable while you’re away.