I've actually been keeping them for the past few months in another sand-based tank, but its currently being rescaped, so i transferred them over to this tank.
I wasn't keen on letting them dig into the soil substrate in this tank and mess up the plants though, so i created a suspended "sand bed" for them to live in. Its basically made from an acrylic feeding dish filled with a layer of sand and attached to the glass wall.
The sand bed is positioned in the path of the filter flow, as these clams are micro filter feeders and do best with water constantly circulating around them.
Here is a close-up photo of the clams in their sand bed...
These clams are quite active creatures, they will move around the dish and dig into the sand using their "foot"... but they aren't able to climb over the edge of the dish (and disappear into the plants and soil below), so its much easier to keep and observe them this way. :)
