Review on 🐠 Enhanced SKEMIX Automatic Aquarium ATO System for Fish & Tortoise Tanks - No Wiring Required, Water Level Control & Filling by Amy Fowler

I love this little thing. I use it on my small rimless 9 gallon tank. Of course, my glass differs by 1mm from the supplied sizing inserts, but I just wrapped it in electrical tape to make it a little tighter. I didn't see it big enough for the old style tanks with the black plastic rim on top so be careful. I use a 1.5 liter Evian water bottle but you can use any size as long as it has that neck size. I have not found any other bottles of this size. This is a simple and effective way to refill 👍