I can not get a picture of my current crocea clam until tomorrow evening. Sorry.

Anyways, I got this clam at LMAR from ReefKoi and it is doing great. It is about 2 inches long and heard these things guzzle up calcium. I know I can test my calcium daily for a week to find the average calcium depletion per day but I would also like to know how much all of your clams eat up daily/weekly. My clam is in a 20 gallon tank so that will greatly effect how much calcium is used up. Thanks for any help.