I had this reservoir for a short while. I noticed a film building up on the bottom panel. I emptied the reservoir and wiped it with paper towel. The towel turned pink. The pink float they used was leaching into the ATO water. I didn’t know if it would have any adverse affects on the tank so I reached out to IM, they never responded to my email. I decided to trash it. Just wanted to let you know in case you ever see the same film. I have a Trigger Systems Crystal 5 gallon ATO. Got it on sale for $75-80, don’t exactly remember. It’s perfect and I like seeing the water usage.