Review on 🐠 WuyouChy Aquarium ATO System: Automatic Water Filler & Controller for Fish Tank Water Level Maintenance with Adapter by Michelle Doebke

This is a great affordable solution for keeping your nano reservoirs full while on holiday. Fits in a standard 1 liter bottle and will last anywhere from a few days to a week depending on the size of your tank, room/water temperature and surface roughness. If you need more capacity for longer rides, just install more. It's certainly not the prettiest piece of equipment, especially clunky on small cymbals, but I still only set it up when I'm not at home.