It doesn’t feel very authentic, even when compared to Slotherhouse. It seems none of the people working on this project were certified for underwater filming. This is truly awful. I'm giving it a 3 because getting rid of that one terrible actor was satisfying; he seemed like the kind of unpleasant individuals who wrote and directed this mess. However, at just 1.5 hours long, there’s something enjoyable about it. It could have been over in twenty minutes if they had simply unlocked the door, so I really despise it.

Source on TMDB