My First Grow

This is the beginning of each week. So I flushed them and switched nutrients. They were mag deficient, nitro toxic. Not PH actually. I'm adding co2 next week after I seal the room. I think I need to back the PAR down to 800 but they are still alive and it's over half way done. How any more weeks? I thought this was a 65 day auto. Hydro in a 5 gallon pot could add up to three weeks I heard with Autos. could these go 12 weeks total?