What’s happening to my plant?

Thanks everyone! I had a concern earlier on i might’ve had some mag deficiencies so I’ve been using some epsom salt as I haven’t been able to buy some cal-mag atm. I’ll definitely keep in mind everything you guys have said and I never knew led lights made them eat faster so thanks Dapper_Buds on that.

Yes I think you should keep your p.h between 6.2 and 6.5 and check your soil p.h if possible and also if you are using led lighting that can also cause this to happen so check your ppd and try to keep it at around 750 to 850 max if you aren't supplementing co2 kid you are using co2 you can hike that number up to 1000 to 1200 depending on the amount of co2 you are keeping your room at also remember when growing with leds you want your temps a lil higher if you don't have ir leds to help heat your leaf surface up to the proper temperature also just a hint check out vpd and learn about that happy growing 🤜🏻🤛🏻✌️

Looks like mag deficiency (purple steams, brown rust spots on leafs) add some cal-mag to next feed . Autos grow fast so they eat an leds make the plant eat more also. Try to also get pH 6-6.5 to avoid lockout. Also mag deficiency hits mid growth first sign small brown spots on mid tier leafs.