First off I would like to say that I do not have the issues of floating/flying penguins. Mine just seem to randomly pop out of the exhibit. I tried something different for this exhibit, it is two areas that I connected under the path and filled with water. The path has one sided glass and there are invisible barriers on each end (so that it is one big enclosure). This is extremely frequent and I have spent time watching and sometimes there isn't even a penguin near the corner and one randomly appears in the path outside the enclosure. Barrier status doesn't seem to be an issue, barrier height and strength is good, they need barrier resistance two and everything except the one way glass is higher than that (and the one way is grade 2, with no land near it for them to get on)