My new Maxima clam is turning itself around in my tank. It turned 90 degrees in my tank today. I had tried placing it on top of my live rock when I first got it but it kept moving and falling no matter how I placed it with rubble to hold it in place. I gave up and put it on the sand bed over a burried rock. I hope it is getting enough light. It looks good but I'm wondering if it is moving because it isn't happy. I bought it 5 days ago. It's under 6 T5s with individual reflectors in my 72 gal bowfront. Because of the bow in the tank it isn't centered under the bulbs. It's more aligned with the front edge of the fixture. So, is this normal or does it mean it's not happy?