Pretty happy looking plant after the tea but brixed at 6.5 (down from 7) a day after applying with an even crisper calcium line.
I'm starting to wonder if maybe I bought the wrong refractometer. Maybe mine was made for the southern hemisphere and numbers going lower are actually indicating improvement.
I know there are different compasses for northern and Southern hemisphere uses.
Probably not so I dusted the soil surface with Oyster shell flour and misted in well as fixing calcium seems to be job one. The reservoir is now in use having caught the excess from the tea so it's going to be some time before I can water it well with dolo water.
I'll see how it looks in a couple of days and think about emptying it if the plant doesn't use it on its own.
The good news is I seem to be able to get those elusive brixing drops easier these days so that's something.