I think the one in the second picture has a touch of nutrients burn, it has yellow/brown tips and edges working from the outside in with dark leaves 1300ppm is high especially every watering, 800 to 1200 ppm is about the number most find the sweet spot. It would be a good idea to give them a flush with plain Ph'ed water.
You could have a little light burn on your Pistils. Backing off your light was a good call and if need you can move it a little more for a couple days to help relieve stress while they recover.
Good luck.