The last plant looks almost dead, I don't know if trying to salvage it is worth it. I would just give them a good watering of just water. Ph it between 6.2-6.8. After that use just water for the next week or so. I wouldn't drown those with water like this person is saying:
i would flush them girls with 3x the amount of water then the size of your pots Imideatly and start with the super lowest nute feed after> Good Luck!
Give em a good watering with some runoff, not 3x the the size of the pot. After a week when you start seeing progress
if you do feed nutrients make sure it is at 1/4 - 1/3 strength or you will run into the same issue again. Consider yourself lucky because your plants aren't in "terrible" shape.
-Good Luck
