additives with a calcium reactor ?

I am running a calcium reactor and I wanted to know if anyone uses any additives like iodine Ect. I have 2 big clams and alot of softies I am just making sure that I can just run the reactor and that is it? any help will be greatly appreciated
 
what kind of filter and skimmer do u use I have seen your tank on here before I wish I could get my tank looking as great as yours thank
 
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