Ray West wrote:
I've tried the ph metres, non of them work well enough to be of any
use, can't even relie on subsequent readings on the same test subject.

Got my money back on them.

It is well known that most tomatoes run at below ph 4.6 and do not
need further acidification,

Everything I've read lately has said that tomatoes are being bred to
be less acidic, so this isn't true any more. I'm a little confused now.

Serene