DIY ATO, Anyone attempted this before?

[sphelps]

Have done and seen similar ones for nanos but I think the system presents some issues for larger tanks requiring more water. I think if you have the space for a float switch either mechanical or electric it's a way better option. A simple mechanical float can often be found locally for around $10, then you don't need the air tight container which will honestly become a pain to deal with 2+ more times a week.