Wow.
SO much info needed ...
What have you been feeding her?
How often?
Do you have and use a ph pen?
Do you have and use a ppm pen?
If so, what readings have you been feeding at?
Do you keep a written record of ph and ppm of feedings?
What kind of light do you use?
Watts?
I will prolly think of a dozen more in a minnit ... but that's a good start.