by fishchef » Fri Dec 25, 2009 8:39 pm
They do keep the sand pretty clean. Its been noted that they almost leave the sand sterile. I ran across a site that spoke of feeding them which is what came to mind because they do seem to be searching for something. My system has some old components, but it was enlarged about two years ago. I do run across many sand dwellers when I clean every other week. The research will continue. Thanks for the response.