Ask Dan Listerman, he had the exchange with Clayton Cone about using distilled back in 2003 or so.
Thanks for that, I remember reading that exchange but couldn't remember who Dr. Cone was discussing it with, it seems to have disappeared from the searching. I am thinking the manufacturer had to use distilled as a baseline for developing GoFerm, what other random water would they choose, out of their tap? and say its the right dosage for everybody? Surely there is an optimal water profile. When I use dry I use RO, follow mfr directions for GoFerm, never an issue, just always trying to improve and wondering if it could be better.