I bought a clam about a week and a half ago and noticed a decilne. Since I don't know much about clams I was wondering if this is gapping . I already posted on a local forum
http://reefcentral.com/forums/showthread.php?s=&postid=8805149#post8805149
http://reefcentral.com/forums/showthread.php?s=&postid=8805149#post8805149