Live Sand/holes

[mattrock]

ello all


iv got a Q about my live sand twice in the last 2days there has been 2-3 holes in the sand at 1st i dint think anything of it and thought it might be the filter and the water flow off the rock making the holes but iv moved my filter and the rock and its still happening so im wondering if theres something in the sand or the crabs could b moving it and there or sumthing is clearing the sand as u can see the bottom of the tank has any1 had this before?? im stuck not sure what it could be

cheers matt

 

[ben1987]

If they are little holes then it could be something tunneling in the sand. If they are big then chances are its the flow off a rock of the galss or something.