Help - What's the problem?

[static123]

Hi guys really struggling with this. To begin with I thought it was heat but I am starting to think differently now. RH is 45 50 at the moment, temp at the top of the plant is 24/5 ph of feed is 5.8 and I am not watering until the pots are light and soil dry, I am using bio bizz products and advanced meta boost.
Lamp is a 250 hps and is a foot away from the tops.
Any suggestions would be appreciated

Not all leaves are like it but there are at least 5 or so

 

[lymp]

Your ph is too low, bring it up to 6.5

 

[static123]

Your ph is too low, bring it up to 6.5

Really ah dam it OK next feed I'll up it to what you have suggested, do you think this is the cause then?
Thanks for your help

 

[lymp]

Yep I had the same problem when my ph was off. The leaves won't recover but keeping at 6.5 will stop it spreading more.

 

[lymp]

Which nutes are you using now, veg or bloom?

 

[grimmreefer]

What medium are you growing in?
5.8 should be good for hydro/ coco, higher as stated above if you are growing in soil.

 

[Ripples]

Below is a link that should help you understand how ph works and why it is so important...

What is pH?