Got a refractometer and WOW, way out...gotta fix

[Okguy]

I would confirm the refractometer readings first before making changes. Take a water sample to you're local store (if there is one around) and have them confirm the readings. If the livestock doesn't appear to be stressed with your current water parameters, you might as well take your time and make sure the changes are required.

I once made slight changes because a new thermometer I bought was faulty and the consequences were pretty severe. Just better to be safe than sorry.