Aqua Splendor

Hello, I bought the XP Aqua Duetto, a Auto Top Off (ATO) for compensate the water evaporation from the aquarium.

It's a really tiny device, and do exactly what you need. Its also super precise, and despite what the company said about small aquarium and a tiny overflow, it just work perfectly on my VERY small return chamber on my 9G Nano Reef aquarium.

I like this device a lot and I think I might buy another one, it save me a lot of time and I have that piece of mind.

If you interested about it I made a video with some tips to help you:
https://youtu.be/jH8_RTBbX7w

ObiQuiet

I have one too, and the sensor is pretty impressive in accuracy!