Myka,
In regards to Clams one of the local reefers here (NAS on Canreef) has to add nitrates regularly to his tank or the clams start to fade in color and don't fully expand out of their shells. I've seen the tank and he has lots of other stuff in there that should build their own nitrates but it's not enough.
I don't personally know a lot about clams but his are beautiful.
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Mark...
290g Peninsula Display, 425g total volume. Setup Jan 2013.
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