I thought that I was obsessed with 9-10 clams. 34 is a lot.
I can keep small clams alive. The ones that I got from Josh at reefstock have put on 2 new layers of scutes - purple & gold and green & gold... they might end up being really nice. I have a LOT of light, though.
These things will use a tremendous amount of calcium if you can get them to grow - I mean a lot.