Neptune Systems ATK Automatic Top-Off Kit
A complete and simple solution for replacing water lost to evaporation.
- Features three layers of redundant monitoring and water-level control
- Standalone device — APEX not necessary for use
| Feature | Description |
|---|---|
| Automatic Top-Off | Replaces water lost to evaporation without manual intervention |
| Redundant Monitoring | Three layers of safety and level detection for reliable performance |
| Standalone Operation | Works independently without requiring the APEX system |
FAQ
Does the ATK require any additional equipment to function?
No, the ATK is a standalone device and does not require the APEX system to operate.
How does the water level monitoring work?
The kit features three layers of redundant monitoring to detect water level changes and automatically add water when needed.
Can the ATK be used in all types of aquariums?
Please contact customer service




Christian Springer –
This kit has made daily maintenance much easier. I no longer have to check the water level every day. The automatic top-off works reliably and keeps my tank at the right level without any issues.
Phil Davidson –
It’s simple to set up and works well in my 55-gallon freshwater tank. The three-level monitoring gives me peace of mind that the water level stays stable.
Emma Bell –
I was skeptical at first, but after a week of use, I can confirm it’s effective. No more worrying about evaporation. The device runs quietly and doesn’t interfere with my fish.