Thought as much - thanks!
Yes - I check the TDS of the water flowing through the filter at the same time I do a puly infused back flush - every 90 shots so about once a month. Probably overkill on the filter check but it is a habit and only takes ten seconds to do.
hmmmm, I don’t empty the steam boiler in the way you mentioned. I’ll add that into the same time as the puly / tds check.
Thanks for the quick response and reassurance!