You have to give me more than that!! I understand they are trace elements but my tank is heavily stocked with large lps corals I am always adding calc mag and alk because there is not enough in the salt mix. Given that fact my tank is probably using up those trace elements as well?
doing weekly water changes should be enough with the trace elements. i have never tested or dosed other than alk/cal. i have lps/sps/clams etc. no issues. if u decide to dose--u need to test. good luck