How much and how often is she being fed? How long has she been getting that amount?Is this the tip drip you're talking about for N toxicity?And if so do you remedy with just RO water for a feed or 2?
What's the medium she's in?
Is it RO water you're using to mix your nutes?
Are you adding anything else?
EDIT: It occurred to me you may not be using MegaCrop. Sorry for assuming so. It is an MC thread after all