Dramatic pH drop in filtered H2O?

[Daddynobucks]

yep pure Na is a no no with H2O, in the resin its bonded with ?? di-alkyl?? what evers. but some Na does get loose as a salt of some type and can screw with K uptake. not that Britta uses this type resin
if you have a GOOD chemistry set you can check for Na in the filtered water.

I think I'll pick one up and do some comparing, I now use a hydro-logic Cl/chloramine filter

Daddy