Spidermite control + Curling Leaves

Ok so iv just checked my plants after leaving them for a few days with my dad, the tips of the leaves seem dry and have curled up slightly ? also the bottoms lower leaves are quite dry ? like crispy ?



Also i brought a bottle of spidermite control, its turned the top of my seramis green ? is this meant to happen.

Heres link to the product :
http://www.growell.co.uk/spidermite-control.html




Ec - is 0.9
ph - is normal
nutes - Canna hydro A+B

any help will be appreciated thanks.

anyone help please ???

Common guys ?

U plant is too young for that ec
i think its like 800 ppm its too high
put it under
u can search for spider resuld c good threat so

iv been told that 0.8-1.0 is the correct ec level for this stage of my growth ? they are cuttings and have been in my DWC setup for two weeks now

For the spider mites use this product http://www.spidermitekiller.com/ for the leaf curling and crumblyness of the bottom leaves could be a mag def... if it is get a bottle of cal-mag use as needed.