180g with T12 VHO's best clam choice?

[ab420]

Hello, I have no experience with clams or with t12's, but I'm trying to help out a nice teacher who has a tank set up at his school.

He would like a clam, but we're not sure what the best option would be.

He has:
2 x 160w 10,000k bulbs
2 x 160w actinic bulbs

They are all 72" T12 vho

There is plenty of room up on the rocks about half way up the tank, and plenty of room in the sand at the bottom as well, so placement suggestions would be helpful as well.

The lights are about 6" above the water

Thanks in advance!