!!!major leaf curl now nurning purple brown please help!!!!

have 2 plants both 4 weeks in veg fox farm soil fox farm nutes every other feeding 600 watt light.

trimed sum leaves 2 days ago the next day all leaves curled really really really bad out of no where. so i flushed it with ph water no food.
got home from work today leaves still very curled now top leaves turned brownish purple. and seem real brittle textured.
both are bag seed other plant is fine.

please help thanks people

Really hard to help without pics.

my leaves curled so much there almost rolling together.

extreme cat clawing

Too much nutes or too much heat. Water next time with too much water to flush her out a bit. Then check ur temps

Could be a few things.. too much heat but the fact that you say purple sounds like its a phosphorus deficiency or fert burn..but its hard to be certain without pics.