Help with edges curling up, leaves curling down & inward, yellowing edges

Calmag is an essential part of any nutrient regime!

So what would you advise??

Try to keep the ph closer to 6.0 make sure your meter is calibrated~

thanks ill try that, I use a PH solution to verify alongside the digital just to be sure.

Ph around 6.0 like MGG suggested will help with Calmag absorption, and rule out simple pH issues. I'd still grab some Calmag nutes and start using as directed.

Ok I'll do that tomorrow. Would you suggest using something like florakleen to flush or when should I start giving it nutrients again? Sorry for all the questions, just trying to grasp all the info as to when to use calmag and with or without nutes.

I do coca so its hard for me to say >exactly< what do do with hydro, but I botanicare calmag. Its synthetic so it can be left in the reservoir without a high risk of algae. I usually add a dose about once every 2-3 weeks since calmag issues show up often, and are very common. I wouldn't bother flushing, there not in that bad of shape and you run the risk of causing more problems then you solve. If you have a tds meter make sure to keep your ppm around 600 (that plant appears to be pretty young still). Use calmag in addition to your base nutrient and feed once every two weeks or so.

You'll learn later that recipe solution like ^this^ will never be perfect, if your new the challenge for the next couple of months will be getting your plants to survive you.

No offense of course, I know what its like to love your plants too much :P