Interesting thread Bev, and also cool to find out that R.Shimek is a member of RC, just like any other J. Doe might be.
Well after reading that, I've sctratched Delbeek & Sprung off my "Books To Buy" list.
I wish to continue using Reef Advantage Calcium so I suppose I will test for strontium after all. Every couple of months or so just to be statisfied that the levels do not go over NSW parameters.
Same for iodide. I think I will continue to use it, and test to make sure it too stays within NSW parameters. Don't want to test too much on some of these elements. As we all know, the better kits are pretty pricey and the longer one can make them last, the better, within reason of expiry. I think every couple of months would suffice for these elements.
Maybe it's not necessary, but I don't know...water testing can be an enjoyable part of the hobby. Call me crazy,

but I actually look forward to it.