brittle + brown tips spreading!

The tips of my ladies leaves are becoming brown and extremely brittle(will crumble when touched). It began with the mature leaves and has now spread from top to bottom and back again, affecting new and old growth.:wtf:

My buddy at the hydoponic shop said he had not seen anything like it previously but thought that it may be a calcium deficiency so, i started with calmax and added power pak for good measure. There has been no change so far(been approx. 1 week)

Should it work this fast or will it take longer? and if anybody out there might have an idea as to the nature of my problem Please help me...i need all the help i can get. lol

Thaxz in advance,

sweet 1

it doesn't sound like a cal defficiency to me... here's a great problem guide...

International Cannagraphic Magazine Forums - The Complete guide to Sick Plants,pH, and Pest troubles!

thanxs 4 the link, i really appreaciate it.

I'm pretty new to indoor growing but I'm also pretty dedicated to learning anything i can that will help me with it.

sounds like u have some kind of fungus i could be wrong.. whats yr temp and %rh in ur room?

sounds like poor root development....can be caused by overwatering or too small a potter.i had same symptoms and poor roots was the cause.i had been overwatering my flood an drain set up.