Girl Scout Cookies in DWC

This week I was keeping nutes around 550ppm, but starting to see some nute issues showing up and the two larger plants were just sucking them up. At the end of the week (so it'll be on next week's update) I dumped the reservoirs and refilled them. Did ~1tsp MaxiBloom per gal and 2ml KoolBloom, adjusted ppm to about 615. About an hour later, I checked on them and the smallest one was just absolutely sacked. I dumped some of that res and watered it back down to 500 and in about an hour it was bouncing back. I'm guessing the GSC cultivar is just really sensitive to nutrient concentration? This adjustment didn't even seem like that much, but that plant is lagging a little behind the others, so I don't know if it just wasn't ready? Hopefully it keeps bouncing back.