Derasa clam not fully extending its mantle

[Cruzersoul]

I have 4 inch Derasa that seems to be perfectly healthy........ that is aside from the fact that it doesn't extend its mantle hardly at all. Ive kept many clams in the past, mostly Maximas, and am well aware of the visual cues associated with them being unhealthy. That said, what might be the reason(s) my Derasa wont extend its mantle more than a couple mm past the edges of its shell?

 

Thanks,

 

Drew

[HarryPotter]

Any pictures?

[Tom@HaslettMI]

From my experience too much flow or calcium/alkalinity being askew will cause this. I'm sure there are a lot of other things that could be causing it, but those were the low hanging fruit back when I owned derasa clams.

 

Tom

[th64]

Where in your tank is the clam? On a rock or the sand? What are your ca/alk levels?