I was wondering if anyone has some ideas on how to help my clam. I have noticed that over the past couple of weeks the mantle on my clam appears to be bleaching. Small white spots have showed up. I am running 2 250watt MH on lumenarcs. The clam is on the sandbed and still appears to react to movements normally. Should I move it?? And if so should I move it up for more lighting or away to less lighting. The mantle appears a little over extended so I'm leaning towards moving it up. If anyone has any ideas please help. I know there are a couple of clam people out there.