Anyone know what this is?

This plant looks sorta sick and a lot of weird stuff going on it looks like cal mag but putting in a fair amount of cal mag and it still looks like this.

In recirculating dwc, gh flora nutes, just started week 6 flower so day 42. Is normally a 60-65 day strain of pineapple chunk from barneys farm.
So far just been doing top ups with full str nutes one day then plain water THE next day keeping Ph and ppms within range..

changed res once in mid flower, after she started looking sick . Sorta looks a bit better but upped dose from 1ml per gallon to 2.5ml per gal cal mag at same time as res change

800ppm with a cheap chinese metre , 5.6ph and using the feeding schedule on the back but at about 75% strength.
 
ghflowernew.png

full strength flower nutes
per gallon
grow 2ml
micro 4ml
bloom 6ml
kool 1.5 ml
calmag 1ml
Epsom salt 0.25 grams per gallon
 
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