Anyone have a working DIY model or knowledge on these? I'm having a surprisingly difficult time finding much. Need to know good sand to use. I'm thinking of crushing my coral a bit more then it is and trying that. I'm incorporating it into my 125 bkgd. I figured I may as well put it in there now or I'll take it right back out in a few weeks to add it.

What's a sand fall? (Obviously if i have to ask i'm not going to be of any help, but i'm curious)

yea only mine doesn't or won't work anything like that one. It will be incorporated in my background. Think first I'll try crushed coral ran over with a 9k lbs. truck Background pics of the 125 coming soon family in town right now.