Just so that anybody reading this thread doesn't think I am being uneccisariliy short or curt with HL14, please click on the link in Jason's post. HL14 was cautioned that the light was insufficient for the clam. Well now the cry for help is very distressing because, except for what can only be assumed to be selfishness, the clam will suffer a fate that was completely avoidable. Hopefully this will be a tough lesson for all that won't be forgotten. Unless we are willing to make the investment and excersize patience to ensure the best possible environment for all of the creatures we want, then we are acting irresponsibly at best. The environment should not just allow the animals to survive, but give them an opportunity to thrive. The pinnacle of success in the home acquaria hobby is when the things in your tank grow so well that you have to sell or give them away. This is the grass roots of conservation we should all be called to. Wouldn't it be great if your clam grew so big you had to donate to a public acquarium!