Couple of things I'm seeing here.... first, you're feeding her too much at this stage of the game... Ctrellis90 is right to tell you to bring that ppm back down... but the other issue is one of temperatures... everything seems to be running a bit to warm for her including your water temps.... water should be no higher than 62F ... and I'd notch the air temps down at least 5 degrees F both day and night... That's most likely what is causing the leaf edges to curl the way they are...
Good luck...