I had Asian freshwater clams few yrs ago.
If you have fish and feed they do well. As long as not to warm . I had mine at room temp tank with White Clouds and fed little bit flaked food twice a day .
I mention feeding as some who keep planted tanks may not feed as much as non planted tank.
This might sound silly but when you get them make sure they are alive . I purchased 6 and 3 were dead.
Shell was shut tight they didn't move for couple weeks opened one and horrid rancid smell the others were dead to.
The other 3 did great .
The live ones will move around and bury (might depend on type but they all move ,slightly open and close)
So place them in front of tank for first to watch them. Make sure none are dead