shit's gonna be rough playboy! in that situation heres how i would roll:
gather these materials:
get a much larger pot (that pot is too small to finish your grow and you may as well upsize now, and save your plant some stress)
Sufficient fresh potting mix, soil or coco fiber to fill the larger pot 2/3 of the way up at least.
at least 2 cups of small size perlite (the big stuff is too big for soil grows)
fill a large basin, laundry tote, or bathtub with lukewarm water, water that feels like it's skin temperature.
place the plant in the water, and GENTLY massage the roots till the soil floats free.
put the plant in the new pot and soil, and give the soil just enough water to moisten it (if you used rehydrated coco fiber it needs no more water)
dont pack it down!
remove the really chewed up leaves and put her back under the lights
by tomorrow she should start perking up.
make sure you get rid of the old dirt (and it's millions of slug eggs!) by dumping it down the drain
from now on, save your egg shells. after you use the eggs, rinse them with water, and place them in a shallow pan in the sun on your porch or balcony or whatever.
as they become dry, crumble them up into rice crispies sized pieces.
sprinkle these shell pieces on top of your outdoor plant's root area to deter slugs and mix up the following:
in a saucepan on the stove, simmer
3 cups water
a large handful of peppermint leaves and stems
6 cloves fresh garlic finely minced (no powdered garlic! it doesnt work and clogs your sprayer!)
3 tablespoons (or more) cayenne pepper flakes
simmer for 45 minutes strain through a cloth (piece of old T-shirt works good) let cool and pour into sprayer add 1 tablespoon biodegradable dish soap, top off sprayer with water put on a dust mask and ski goggles (super important) and SPRAY EVERYWHERE!
wash hands thoroughly with soap before touching eyes mouth genitals or butthole (really really hot stuff)
it's non toxic (just spicy as hell) and washes off with water easily do not use on your buds unless you're a masochist. wash any produce before eating. and seriously, wash hands with soap before wiping your ass or holding your dick.
once a week will keep aphids slugs snails and whiteflies in check like a motherfucker.
Warning: may attract Hispanic, Thai, and Punjabi cuisine aficionados. do not store near salsa fixins or noodles and shrimp.
a good spray on your plant's leaves will keep slugs and any other hungry plant eaters at bay. only use it on leaves, dont put it directly in your soil (worms hate this stuff too) and dont spray your buds.
this stuff will protect your plant from every plant eating pest, but some slug bait would be a good idea too. (Sluggetta brand slug bait is safe for pets as long as you keep them inside while actually applying it)