Hydroponic newbie

[Wallie23]

Hello guys,
Haven't posted in awhile but things have been going really good with my SODK in the waterfarm. I have started to add nutrients for awhile now but I noticed the leaves are curing a bit... As well as the leaves on the bottom have died, is this okay? Does anyone know what this means?
Here's some pics....

 

[Wallie23]

Sorry I meant curling not curing!
Thanks

 

[Barney86]

She looks sound mate. Maybe a bit high on the nutes and the curly edges says it's sometimes too hot or there's a light too close but nothing drastic.
You changing the res regularly and keeping the ph in check aye?

 

[Rifleman]

Looks like you might need to increase your ventilation and air movement.