I just got a Derasa Clam and it is sitting on the sand bed. As I was looking at the clam today, I noticed that on the inside of the clam, it had some particles of sand. Should I remove these particles from inside the clam or let the clam do it itself? On a side note, I am new to clams. This is my first. It is under T5 lighting on a 120 Gallon tank. The light fixture is a 48 in Current Nova Extreme Pro. So far, the clam is opening regularly, and is responsive to the light (or lack there of when it is off), and is also responsive to loud movements. It is not gaping or anything like that. Here are some pics. Notice the sand in the clam on the first pic. Sorry about the sideways pic on the second.