Autoflower deficiency everytime

Heyy, just starting my 3rd round of autos, use ff oceanforest plus some extra perlite, and just the FF trio for nutes, calmag, and ph down. 4x8 fabric 5 gal pots and 3 T1000w Mars hydro lights. 1st and 2nd rounds got about 1 oz per plant. Everything looks great until about 5 weeks in and I start getting deficiencys, I've tried more and less nuts/cal mag. Finally bought a great 60$ ph pen, 20$ one was off .8. I dont know what else to do, any tips for my autos? My non autos turn out great using same method btw.

Try this.. https://www.autoflower.net/forums/threads/tangs-easy-auto-feeding-schedule.47290/

I had the same frustrations, until on the advice of my nurseryman (plant biologist) I ditched the FF trio/cal mag and amended my FF soil with Growing Green dry fertilizer and water only til week 7 when I add Hasta Gro for plants every other watering. I haven't had an off colored leaf since and more than doubled my yields. Learning how to LST had a lot to do with increase as well. Before and after.

Awesome, thanks for advice i appreciate it!!!! Deff will try