Originally Posted by justlooking
I think if one buries and dies, it can also cause a nitrate problem.
The clams that died in my tank found their way to the top of the sand before they died. Don't think any died under the sand only because i haven't had any nitrate spikes. It was explained in another thread that, unlike mussles and oysters etc, the clams natural state (muscles relaxed) is open. It works to keep the shell closed. When it's dying, the shell opens up. Don't know if the opening of the shell forces it up, or if it's just the clams instinct.