Hi just chiming in. I would move the hammer further awayfrom the clam. Also i would put the hammer in the Live Rock and not the sand, it will be able to open more with the extra space without getting sand in the heads, and it will also get more light. It will also dispurse the eye focus of the tank making your aquascaping more aesthetic, just my opinion. Also, and i may be wrong as i do not have a clam, is that iodine does not do much good for the tank at all unless you have leather corals and even that is in question. Check out this link for begginers http://reefkeeping.com/issues/2007-04/rhf/index.php go to the iodine section. Just my opinion and the person who wrote the article lol!
THANKS FOR THE TIP, I STOPED ADDING IODINE.AND I HAVE THREE LEATHER FRAGS BUT I DIDNT SEE A DIFFERENCE IN THEM WITH IODINE.

