i have a 55 gallon tank with 260 watts of power compact 130 is atinic the other 130 is daylight 10k would i be able to have a clam and if so can i place him int he sand, or would i have to have him up high on live rock because if i place him there it will be hard to keep him there hwen he grows unless he will be able to stick himself?

good question, and yes clams do stick themselves, i started mine in the sand and it just didn't look like he enjoyed it (sand sifting goby bothered him) so hes now up on some live rock and he stuck himself at a strange angle but hes doing great, at first i was told clams need MH lighting but mine seems to be doing great with T5 HO