WTB Small Clam

[Ruth]

You know for the health of a clam you are probably better off waiting until you get your new tank set up and stable with the correct light. You always hear stories of a friend of a friend that has such and such that does just fine under PC or NO light (or whatever the case may be) Yes there are exeptions to most things in this hobby and other things but that is just what they are - exceptions.
A Gigas clam will get huge in time and if you research clams you will find that most sources recommend MH lights for clams.
I have 6 clams in my 230g - crocea and squamosa - all doing well and all under MH light. I didn't add any of them until my tank had been set up for 7 months and was stable. With my new tank that has been set up for 6 weeks I won't consider adding any for another 6 months.
It's your tank and you can do whatever you want but clams are expensive and will have the best chance under good lighting and water conditions.