Interesting scape.

[BIG-G]

I have seen sand falls before but nothing like this.

https://www.facebook.com/video.php?v=549006755438648

 

[Wailua Boy]

Pretty cool looking but I wonder if the free falling sand/silt could irratate gills.

 

[BIG-G]

I would think that if the sand is heavy enough and not causing any cloudy water it's probably okay.
I have seen a few threads on here with sand falls maybe someone else can answer for certain.
Santa Fe Discus

 

[Wailua Boy]

I ve just noticed the fish tend to avoid the sand falls, is why I mentioned.

 

[tlindsey]

Wow very unique.