How to install hygger 987 Auto Top-Off Kit:
1. Install the hose holder and soft pipe on the tank edge
2. Mount the ATO monitor
3. Connect the water pump, it will auto-refill water for your tank
4. Place the monitor horizontally
5. Sound alarmed & LED indicators alarm automatically
6. One key to drain water
Note: The monitor is not waterproof.
To prevent siphoning, the soft outlet hose should be higher than the water surface.