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

This little ato actually worked way better than I expected. I had to cut the hose several times because I wanted as little variation in salinity as possible since this was being used for a 1.2 gallon seawater tank. You can use Voss bottles and they looked good

Love it! I looked at all the other electronic options and chose this one because it's simple and inexpensive. Definitely a great buy. I had to modify it a bit to make the hole bigger to fit my nanocube, but this was an easy fix. Still 5 stars in my book.

First I cut the two hoses too evenly - they were only slightly different from each other. The bottle gurgled a few times, then stopped. I removed the template and made one of the pipes 3/4" (about 20mm) longer than the other. Now it works great. By the way, this is a great way to add water to your tank as the flow is gradual - no sudden shifts in temperature or water chemistry.

Works as well if not better than some of the much more expensive ATOs. It's a very simple design that works with no moving parts, electricity or pumps. I'm glad I bought it for my nano aquarium because it keeps my salinity very stable. It fits easily in a standard 20 ounce or 1 liter bottle. It also has additional parts for customizing rimmed or rimless tanks, which I thought was a great addition for the price.

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.

Works surprisingly well! I hooked it up to my nano (10 gallon) aquarium and it works very well. I have a 1 liter bottle and it works as long as you follow the directions. If anyone uses this for the same rim tank I have, I used a notched insert and a small piece of thin box to glue it to the rim. I have expensive electronic ATO's for my other systems and I think this works pretty well as long as it's a small tank unless you want to tank a lot.