Yeah I've heard good things about the oaktons but maybe yours is one that can swing both ways. Mine is ULTRA basic(what a great name ) ....not a bell or whistle to be found.

Mine is actually a back up tds meter....I use a BlueLab e/c meter and it not only reads e/c but a 0.7 AND 0.5 conversion all at the same time. Otherwise I would constantly forget which one I use......so yes, I'm sure of the conversion there.

Do you see defs in flower? What kind of issues are you seeing?