im fairly shit at the defs/toxins game.
flushing as in the traditional 3 times the pot volumne of plain/ph'd water ? never been a fan of flushing,i feel 1.to find out the pot ph by slurry test/or any other test is/will give dodgy results,and needs repeating so not worth it.2.flushing will remove most of the nutes/micro nutes,salts(being biobizz wont be many),minerals,microbes and whatnot.maybe better suited to a tox than a def.
if ya think ph is only slightly off,then adjust slowly and in small increments.
soil growers,when we see a def/tox its allready upto a week old.we dont feed the plant we feed the soil,soil takes a week to break down bottled food into plant food.in soil we can be 2 weeks behind,and it can take upto another 2 weeks to fix things fully.
ramblings of an eejit that talks out the top of ther head more often than not.4th opinion and all that.
good luck n keep er lit