How do you care for the clams from Octopets? I set up an Eclipse system 12 with a powerhead...I know that they are syphon feeders...what else? Substrate? Oh! I was wondering if I could maybe, for simplicity's sake, keep them in the sump of my 125 gallon reef aquarium. What about how often they need to eat? Lighting isn't a priority, is it? I need all the kelp, er..help, I can get in this area. I'm pretty much in the dark.