what are the effects of high salinity on sps?

[MitchM]

Sorry if I keep pushing on this, but your claim of your corals showing no stress, after a year of lowering salinity down to 1.017 surprises me. I'm wondering if you are getting accurate results even now. Corals need a certain balance of ions in order to process their life functions, so they would have had to take in extra fluid in order to compensate for the lower available ions in the water column.
You have a great looking tank and I would hate to see it suffer for a preventable reason.

The only calibration solutions I've seen are ones that you use for a probe, which you have to warm up to 25C, or ones that are stated to be 35ppt, that you can use on a refractometer.
Having a calibration fluid at 1.026 without stating at what temperature, leaves a critical bit of information out.