Help diagnose hydroponic plants! Too much light/heat? Nutrient issue?

Arrg purple light ... cannot see.... 😜

That is 100% light and heat stress. Some of the leaves are literally being fried(the brittle looking brownish ones that are curling) and the others are just really stressed by the heat and light but not to the point of being fried yet. you can tell they don't like the heat and light because the leaves are curling at the edged and kind of cupping up in response to being too hot. deff try lowering your temps and raise your light a little if you can. also try taking pictures without the blurple lighting. the purple light makes it incredibly hard to see any sort of color or detail on the plants. not being able to see the details people can misdiagnose something because they thought it was light green when its actually yellow or brown or hell even purple. so next photos shut off the purple light and either use your phones flash or use white lighting to take better pictures.

Hey my friend :-) . I would rinse with pH regulated water Cal / Mag and a quarter dose of Ec. That should help until the end and you are on the safe side 👍 Let it grow it will be great 🙏🏻🍀👌