New Grower Dry and curling up leaves

[13_12]

Hello all,
I am back once again I desperate need of help, I went away for the weekend and when I came back loads of the fan leaves looked dead, dry, the tips were curling up and were yellowing,
I have no idea what this could be ?
I thought it could be too hot at first but my grow room is at 24C and 40-50RH
Before leaving I watered it with just ph balances water, no food,
When I came back it needed watering again so I fed it (.5ml/L floramicro / .1ml/L floragro / .5ml/L florabloom)
If anyone knows what’s happening I would love some help

 

[namvet25]

Is that 5ml per litre?

 

[13_12]

Is that 5ml per litre?

No 0.5

 

[namvet25]

That is to week to cause nute burn. It looks like there well on there way for flowering so if you can i would flush them out with cal/mag leave them go awhile then just give them bloom nutes but 5ml per gal along with 3ml per gal cal/mag.it could be ph problems so keep phing all your water.

 

[BII]

Please tell us the type of medium (soil, coco, etc.) you are using; and related to this, what is your target feed/water pH.