I just got the Iodate/Iodide kit from Salifert and tested the water in the reef I maintain and found it difficult to read, looked like 0.01 or less for Iodide, and I don't know what for Iodate, I couldn't tell if it was 0.06 or 0.
I would get a kit and test yourself, unless you REALLY trust your
LFS.
I'm going to mix up a fresh batch of
RO w/Reef Crystals and test that against the current tank water...