Potassium Defeciency

So I recently changed my ff solubles i was using beastie bloomz 0-50-30 and changed to cha-ching 9-50-10 I instantly noticed after 4 days of there new nutrients potassium defeciency started. I didnt correct the situation and let it go. I now noticed its definately spreading to most of the fan leaves and the bud hairs are kind browing as well. IT getting late in the season. Are these signs normal so late in season? Should i let it continue or give them some potassium that they need. I know the yellowing is normal but this is definately potassium problem. Are the plants to be potassium deprived in the last stages of growth letting the defeciency spread to the majority of the fan leaves.

Yeah I always let my nutes sit about 6 - 12 hours before feeding and shake it again.
Also to help evap chlorine.

Phenom420 said:

Yeah I always let my nutes sit about 6 - 12 hours before feeding and shake it again.
Also to help evap chlorine.

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I am running a soil setup and mixing of the nutes hasnt seemed to show any signs of problems. Just once I changed from beastie blooms wich had a k rating of 30 to the cha ching wich only has a k rating of 10 i noticed the leaves burning on ends curling up ect ect all the signs that the plant needs the potassium. But with the cha ching wich calls for less potassium and used at end of growing i assumed this may be normal. I guess im saying should my plant be looking defiecient of potassium and the leaves dying off from lack of potassium the last two or three weeks of growth or should i give some potassium and just look for signs of the plant only need nitrogen since the nitrogen isnt really needed now.