what are your experiences keeping any type of clam under T5's (maxima , squamosa, etc.) i have 4*54 W (Tek 5) 72 gal bowfront. it sits two and a half inches above the surface. the deepest part my setup is 21 inches, while the most shallow is 8 inches from the surface. the lights are on for 12 hrs daily. CSS 220 skimmer plus enaly ozonizer have made my water extra clear. I would like to keep all types of clams but my ideal (for starters!) would be a T. gigas on the sand bed. thanks, any advice is appreciated.