@DILLIGAF check out this site it's a company which may be in your neck of the woods they have some great info on their site they did some testing on various companies nutes. https://medteknutrients.com.au/about-hydroponic-nutrients/
Also State of Oregon Department of Agriculture http://oda.state.or.us/dbs/heavy_metal/hitlist.lasso You can use there site to search for registered nutes.
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