AQUA ONE AQUAFILL AUTOMATIC TOP UP FOR SUMP SYSTEMS
The AquaFill automatic top up system is designed to maintain a stable water level in an aquarium or sump.
In marine systems, automatic top up aids in maintaining stable and consistent salinity levels by providing small amounts of replacement water constantly as evaporation occurs. The 3 float switch system ensures reliability and prevents damage to the top up pump in the event the reservoir is emptied.
| Feature | Specification |
|---|---|
| Float Switch System | 3-stage float switch |
| Operation Type | Automatic top up |
| Application | Marine aquariums and sump systems |
| Function | Evaporation compensation, salinity stabilization |
FAQ
How does the 3 float switch system work?
The 3 float switch system detects water level changes and activates the top up pump only when the water level drops below a certain threshold. This prevents the pump from running continuously and protects it from damage if the reservoir is empty.
Can this system be used in freshwater aquariums?
The AquaFill system is specifically designed for marine systems and is not recommended for freshwater aquariums due to differences in salinity requirements and water chemistry.
What happens if the reservoir runs dry?
The 3 float switch system will stop the pump operation to prevent damage when the reservoir is empty. The system will only restart once the water level rises above the safe threshold.

Carol Miller –
The AquaFill system has been running smoothly for over six months. It maintains a consistent water level without any issues. The 3 float switch design prevents the pump from running dry, which is a big relief for my marine tank setup.
Edward Sharp –
I noticed a small delay in response when the water level dropped, but overall it works reliably. The system keeps my sump stable and helps maintain salinity without constant manual checks.
Austin Johnston –
Easy to install and operates quietly. I appreciate the safety features—no pump damage even during short dry periods. It’s a solid addition to my marine aquarium maintenance routine.