That is an image from one of Michael Paletta's articles on Reef Builders...
@Mike Paletta can you weigh in here? This tank you used in your article, was it a tap water tank? And what are your feelings about using Tap water in a Reef Aquarium?
Edit: Upon further investigation, this seems to be an image that ReefBreeders uses over and over, featured first in an article about Masano Shibuya's tank in Japan, here's the video they feature in the article
So maybe Mike won't know for sure.
But that raises a question, why are you using someone else's image/tank to support your use of Tap Water. Seems pretty fraudulent if you ask me...