SHIVA SKUNK girls need help pls

hi fellow gardeners so here is the situation
i have 4 fem shiva skunk girls from sensi ,(the last seeds they are 1 year old and were stored in fridge), under 250watt hps lamp ,they are 38 days old in vegging,i am using biobizz light mix soil,biobizz nutes ,biogrow algamic and diamond nectar from GHE,EC1.4 PH 6.7 , i used bioheaven before but this time couldnt get it on time so i bought diamond nectar instead  the temp is around 25°C ,humidity is 50%

the girls have many branches and  really bushy and keep growing

so i grow this strain before without problems and this time i have problem
this time i had a layer of hydroton on the bottom of the pots but i forgot to presoack the hydroton in ph water so they start to have ph issues but i transplanted the girls in bigger pots and no hydroton and ph problem solved but the yellow tips stay and continue

all the girls are light yellow green not so strong green like usual

the tips on the new growth and old  are yellow and curling down a bit ,and few bottom leaves are uniform yellow and fall of easy ,not many but few

so normally when the tip are yelow means overferting and yelow leaves means they need more food  ,but both signs at the same time ??? no idea what to do
i water feed the girls every second day when pots feel dry
i think i gave all info necessary

please some advice 
best regards

There can be multiple problems at the same time.

Anyway the problem that you are having, isnt critical atm.

maybe sensi stuff members can help???
no?

overfertilising is also called reverse-osmosis.osmosis is a stronger soloution attracting a weaker soloution.in normal conditions the roots are the stronger so they attract the soloution from the soil.if however you make a nutrient sol too strong which is what the ec meter shows you the soil becomes the stronger so sucks the water out of the plant thats why its called burn  its literally drying out .a slight nitro deficiancy is better than catasrophic fert burn cos it can kill the plant.using too many nutrients in soil can cause a build up of undissolved salts in the soil causing toxic effects..in hydro the nutrients are composed differently and are much more forgiving.just set the ph as best and genltly build up the nitro.iam sure thats the problem.best of luck.

keep the ph stable .as it might a be contributing factor its super important.that other stuff u was using which did not dissolve properly .probabaly had something to do with it causing overlapping symptoms but i know nothing about that stuff so cant comment.

i am sorry to go on but i am really trying to think what that is.i just thought as i said before maybee your ph in your feed in the water is okay ..can you take a soil sample and see what the ph in the soil is maybee you could soak some soil in distilled water for an hour and then test the ph and ec of the soil soloution it may be different all the nutrients in the soil could combine and become too strong or make the ph go wild if its bad you can leach the soil with clean lukewarm water this will wash out the soil.i used to do this with my plants. check for white deposits around the pots excessive salts in soil would affect the ph

 hey man thx for interest and help
the girls are in 3rd week flowering now and shiva flower so quick in 43 days  they are usualy ready
the problem is underfeed not enough food hahahahahaha now its all ok  the girls are so bushy and so many branches  they needed more food and i was too paranoid like ususal to give more lol
have some soil mites but they are good ones so i leave them alone try to kill them before but they just leave in soil and eat all the dead matter and larvaes of the bad suckers
took some clones  and they all rooted easy in soil after 10 days

so cant wait to smoke my medecin
thx for helping and taking time
best regards  +REP