Overload or Good thinking???

So far me my bubblicous have been having having since flower canna coco a+b and boost but thinking bout introducing some pk 13/14 in the mix @ day 28 currently on day 22, just wondering what ratio you lot think??? Gonna need to cut back on some or serious nute burn is gonna be an issue....... does anyone do same or have advice??? 1st time coco grower used nft before with vitalink thought it was waste of time didn't like the system
 
Being stoned and writing dunt help but just thought lol.... want to introduce @ week 4 very little pk, advised usage on week 5 and 1/2 or 1/4 usage @ week 5 over and out lol
 
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