Quote Originally Posted by Ian Grant View Post
Could you explain all the EDTA, it seems excessive and should be totally unnecessary.
I live in a very hard water area.
The parameters are:

pH 7,5
conductivity 546us/cm
Ca 98 mg/l
Hardness 32 F
Cl 6,5 mg/l

so it's logical, at least for me, using a wash water with the EDTA as the sequestring agent for the Ca.
This allows me to save the distilled water for mixing the chemicals only.