I have had a Derasa for about 3 months now, and the Clam has pretty much doubled in size. Everything has been going great, but for the last 3 or 4 days, it hasn't been extending its mantle quite as much as normal. The mantle does not look pinched and the Clam is not gaping, it's just not as "fluffed out" as it usually is.
* I have inspected the Clam for snails and/or pests, but I do not see anything.
* I have noticed over the last week or so that the Derasa has changed its position about 90 degrees. It seems to be getting more light now because of this position, so I am wondering if its not extending as much because of this?
* There have been no recent changes or new additions, but I have been removing Mushrooms lately. I wonder if the shrooms have been releasing chemicals which have made the Clam unhappy? I am running carbon just in case.
But that's all that I can think of, so I am wondering: Kind of like Leathers, do Clams have bad days? Aside from not extending its mantle as much, the Clam looks perfectly healthy, but I am starting to worry.
Thank you for any input!