nah youre not missing anything... after you flush out the cal mg you should be fine to continue with bloom nutes.. i would of course stop using the cal mg though... and i doubt over watering is the issue. i had a very similar lockout and i noticed it appeared as a deficiency.. one flush i was...
hey i bet its that cal mag in flower... i understand calcium in flower isnt a good thing.. i think mg is fine though..the calmg is creating lockout .. nice plants though.
one thing ive noticed is to stop feeding calcium in flowering and if you want to supplement magnesium, you can use epsom salt... but for your friend... he should just use plain water for one watering..or a light feed.. then for the rest of the grow feed however.
i dont have a consistent method yet... my first harvest here i hung with no fan for 10 days only to find mold forming.... so now i know to atleast always have a fan but theres such potential to over dry and then find yourself struggling to draw the rest of the humidity out before finishing...
i suppose its about the climate. i lived in dry conditions where unchecked your crop could be turning to powder upon contact. i find in this super humid climate im in, i use jars more so to protect the buds from the humidity outside and seems like paper bags or newspaper help with controlling...
i put out early march and my ladies are flowering pretty hard from the top, they were reveg'd already, what exactly should i expect? i imagine i may have a short window to harvest a small crop before the day increases. will this harvest be at all decent?
i suggest spinosad as DonBrennan said. i use monterrey spinosad and ive only have one particular pheno that would not stop attracting thrips. Definitely should be disposed of.