Howdy, I have seven ponds in my backyard and raise koi and waterlilies, have been thinking about clams and know nothing about them.
thanksfor any info
Robert Baxter

 HI!  Found some clams in local creak here in northern CA.  Kids would love to know how to care and keep them, if we can find out.    
 
If you can help, thanks!  
Amy

 they eat debree in fish tank when they get dirty. but don't let it get to dirty