the tips of my leaves are bright yellow.... any one can help me??? need advice

my plant is in 3rd week flowering an the tips of my leafs are bright yellow can any one help me what this could be????

i feed the plant ever3days big bud,top shooter,tetra flores and strive once a week am i over feeding it?????

so what i have decide what i will do is to stop the feed on next watering the next feeding will be just plain water to wash all the salts down is this a good idea can any one HELP ME PLS
will i damage my plant by doing this or is it ok ?????

after the water flush i will restart the feed the next time watering is due can some one give me some advice thank you

the plant has lots of buds

Yellow tips are one of a few things pointing to the start of over-fertilization.. would go 50% on the nutes and see if it improves. Highly recommend a flush, yes.. and then slowly work up with the % of nutes until you find the 'sweet spot' for the strain.

thanks for the advice