I read that. Sanjay certainly raises some issues although he was carful not to opine which service was more accurate. I wonder whether if you send two samples taken at the same time to the same ICP service you get identical results. If so, that would at provide some comfort.The Basics of Minor Trace Elements in Reef Aquariums | Reef Builders | The Reef and Saltwater Aquarium Blog
As the hobby has continued to expand and the knowledge to be successful with it, some aspects have been found to be more important than originally thought. Foremost among these is water chemistry and…reefbuilders.com
this newly released article on reef builders seems to answer a lot of your doubts above.