FlyPenFly
SPS Killer
Here's some more on trace elements
http://www.advancedaquarist.com/2004/9/aafeature
So lets say like most people you use a 5 gallon bucket for a 50 gallon system so it turns out to be about a 10% change, diluted down you're adding in a tiny amount of trace elements and you will never be at the same levels you were at the start. Not to mention, NSW and the trace elements found in synthetic salt are pretty different anyway.
http://www.advancedaquarist.com/2004/9/aafeature
The results of this study demonstrate that the vast majority of synthetic sea salts for use in marine aquaria do not have concentrations of the trace elements examined that are substantially greater than that of the natural seawater available to the marine hobbyist. Furthermore, for some trace elements natural seawater had a greater value than some of the synthetic sea salts. Moreover, Catalina Water Company, which is a natural seawater product, had a lead value that was one to two orders of magnitude higher than other samples. It is clear that most synthetic sea salts do not add substantial amounts of trace levels to aquaria when compared to the natural seawater available to the majority of hobbyists.
So lets say like most people you use a 5 gallon bucket for a 50 gallon system so it turns out to be about a 10% change, diluted down you're adding in a tiny amount of trace elements and you will never be at the same levels you were at the start. Not to mention, NSW and the trace elements found in synthetic salt are pretty different anyway.