As a result of my canopy shattering, I've had to change back to my old aquarium hood (with stock lights). My crypts (short ones only - the tall ones are growing like weeds!) and swords have started dying off (as opposed to poor growth, but survival earlier) and I don't know why, since they're supposed to be low-light plants. I'm shoving 3 root tabs straight into their roots and dosing 1.5x dose of Profito every weekend at this point, but there's been no progress in 2 months. What could be wrong?