Spiney Oyster

[Gina]

I purchased some live rock yesterday that has several very healthy spiney oysters on it. They are filter feeders. I want very much to keep them healthy. I have easy access to plenty of natural sea water and can easily make water changes each week. I would like to know if there is anything else I could put in the tank to feed them or would they be better off with the nsw.

Thanks,
Gina