Sand dollar info.

[corpusse]

I had one for about 3 weeks. Looked great, ate something in the sand. Took him an entire day to get across my 5" tank. One day I noticed he didn't move and sure enough there were several polyclads stuck on eating him. He was already dead. I hate those things (giant flatworms).

I have heard they don't last long term but from what I could tell in the time I had one they find enough to eat in the sand bed. Very interesting creature. I would recommend a mature sand bed and not much competition.