[Woodstock]

Maybe, maybe not. Before answering that question, we must first define the variables of the salt used, the filtration and what they actually do. Are you using a salt that is high in heavy metals, has an overabundance of major/minor trace elements? Do you have a tank full of corals that are absorbing most of these? Do you use a refugium and regularly trim/remove macro algae? Are you using a skimmer? Replacing carbon often? Using a media that adsorbs metals (such as a polyfilter)? Do the above really remove unwanted elements and to what degree?

IMO, If the amount of importation of elements is greater than the exportation, then, yes, an overload will eventually occur.