how big do they get and are they FW? how muc is it $?
typically, they do not get any larger than 2-3" across.
They make a nice natural filter and help to complete your biotope
how big do they get and are they FW? how muc is it $?
Has anyone had any real long term success with them? More than 6 or 7 months?
i used to have fw clams, probably almost a yr, until the summer heat killed them ='( they were so cool, i was so sad. but its easy to tell if ur clam is dead or not. when alive, they always have their siphons out. to check periodically, i would squirt some water at them to see them retreat their siphons back into their shell so i would know they're still alive. i have a 20 gallon planted tank, and until i can find a way to keep the temp consistently down in the summer, i would not get a clam again =(
no.
I haven't.
I think because they are filters, they are very sensitive to water changes.