2 issues that I see here - you're not giving her enough water if you're only giving her, on average, 0.13 gallons of water a day and she's this old... you need to soak her thoroughly so there is runoff in your tray/saucer/whatever... let her sit for a bit to see if that water is soaked back up into the pot - if it is, give her more water - and do this until no more water is soaked back up and then pitch whatever is left in the tray/saucer. And while you're doing that, you've got to lower that pH as a pH of 7, although they say weed can be grown with that, is in reality much too high for a lot of nutrients to be absorbed by the plant. The pH should be between 6.0 and 6.5 in a soil grow.
Fix those two things and you should see good improvement. Good luck!