well someone is very lucky not useing a Ph meter!

I used to run Ph at 5.2 but was harder to maintain that low(needed checked three times a day)
now it is between 5.4-5.8, because of availabilty of Ca, and Mg
my northernberry likes it low,my nevelle haze likes it higher,so it is a compremise

Latewood addresses this when he suggests raising the Ph over the last 4 weeks or so

but yields have almost doubled, with the higher Ph levels?