is yellow leaves normal

check yer runoff pH, man...
how's it reading? yer pH meter will give you the answer to that one.

i'd say that the bottom line is that when you harvest you'll suffer decreased yield from 'optimum' for your pheno on account of the lockout...
"live and learn" as they say and i'm sure you'll get that fixed-up for yourself on the next grow!

cheers
-g

thats very true thanks for let u know what happens in the next couple of days

checked it 2 days ago ph was 6.4, shall i add more ph down

also the bud looks nice alot of thc but the leaves are dead will it survive