Sand dollars, are they easy to keep?

[Lynnmw1208]

I noticed today on divers den that they are selling 2 sand dollars. I've always loved these things and was wondering how hard they are to keep. says on the website that they're moderate and I was wondering how moderate.

Sand Dollar (Dendraster excentricus) http://www.liveaquaria.com/diversden/ItemDisplay.cfm?c=2733+4&ddid=106131

 

[Korrine]

no most starve in our tanks. Don't try them

 

[Toddrtrex]

In addition, you will never see it.

 

[shrimphead]

If i had a big enough sandbed i would get one.
I read they need alot of sand to survive because they "injest sediments and eat diatoms, other microalgae, and bacteria. may feed on algae in suspension." from the sandbed, they need a sandbed of atleast 4 inches deep and 1m2 (10ft2) surface for an individual of 4 inches in diameter.
this information is from the pocketexpert guide, marine invertabrates, ronald l. shimek