Just finished a 30 gallon vertical with a water feature for a yellow eyed tree frog. The water cascades down a piece of cork bark and drops into the pool about 6 inches below. It is pretty loud, even more so inside the tank, I would imagine. So far, the frog seems unaffected; business as usual. But I'd still like to ask more experienced keepers up here, whether they'd ever observed a similar tree frog getting stressed or freaked out by constantly loud, splashing water.