would clams benefit from feedings of cylopeez? I just introduced a blue green crocea approx 6". Also, I just noticed a small hole in it's shell close to the bottom side around to the back area. It's about 1/8 " dia. approx. and I don't know if it was this way at the LFS or happened after I put it in the tank. What, if anything, should be done? TIA, Tim