First run of in house genetics

Going into the 5th week now and they have all had tap water sat for 24 hrs only so far im thinking they are using up the last bits of food in the soil already or the ph mite be a bit off as you can see a few leaves are starting to turn colour on the tips from only water last night was the first bit of feed i have given i gave them 4mls between 4lts and gave them a ltr each to soak through it ph at 6.3 hopefully this will give them some help im no expert so i could probably kill them lol iv done one before and it was all fine until I started adding food then they start to die quickly so this time im not giving as much food for the time being and not as much water to see if it improves or makes any difference any advive will be appreciated the slurricane is going massive compared to the others sticky glue not to far behind the jelly breath is catching up to that and the amstedam genetics is still tiny they all need some defoliation aswell. Thanks peeps.. Happy growing