Well the water from our tap is drinkable a big change there but it makes me wonder why the readings didn't change
an im thinking that you get the same OMM
I hate to say this jaga. I use RO water and nothing else. I don't even have a working meter and never measure anything. All my nutes are in the soil already. I use Osmocote an mix it with the soil before planting. Been doing this for years. Much easier. Works too. Look at some of my past grows. Peace Brother.