;D 8) I just bought a new clam today. It's green and blue and it's about 4-5" long. I have 260 watt PC's but i've heard that they need a lot of light so is that enough. What do they eat? Just use sunlight or what? Are they hard to take care of. I have a yellow polyp, a brittle star, a turbo snail, 4 hermits, and 50 nassuarius snails. Will any of those things hurt the clam.