Chris, I think this El Nino is about as cranked up as we're going to get. It's already hitting historic strength, and Yikes! Carol's in California where they haven't seen rain in years, it seems. And they're getting rain!
Didn't you get some rain or snow with this last front that went through? Or did it all pass to the north of you? That's been happening to us here.
In the water report, is there a number for the pH of the water? Anywhere around 7 is neutral. Above about 7.6 is getting pretty alkaline. There should be readings for the soluble salts, too.
Yes, I do think you need to let those guys dry out some, for now. Just a light spritz of the Epsom salts solution every couple of days while the weather is cold should be plenty.