I'm currently at 015 tds and not getting any spotting at all. But will be changing resin tomorrow. Just out of interest How high has everyone else gone and not noticed any spotting? Oh and merry Christmas to all on the forum from lovely dorset.
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i had a long think about how high i had gone without spotting,i do remember the day as back then i kept a lot of notes regarding tds and other things, i was cleaning a farm house come b&b and had run out of water and had a new clean to do afterwards so, i filled the tank up with their tap water at 236ppm, i had to go back through the notes to verify this as it was late summer 2013.I won’t say how high I have gone when testing additives in the past with @kevinc250 but I’m sure he will agree that people worry about ppm more than they should
As long as it’s around 5 I’m not even thinking about it