Need help

Most likely Phosphorus deficiency. Thats how it looks to me. Plant is on good diet, just slightly underfed. Watch out for high humidity during nights and bad air movement if diet is well sorted... thats how it looks to me.

i would say calcium or chlorine/chloramine. depending on your water source, i personally have to boil my water for 15 mins and then let cool. so ill boil a couple pots of water and pour them into a 5 gallon bucket outside that i use as my water source. i tried the letting it evaporate off but i was still having issues so ive been boiling my water for the past year or so and i dont have any leaf chlorosis from that. we dont have high ppms here but we do have chloramine in our water so the plants dont like it. once i started boiling the water i didnt have random deficiencys i couldnt figure out(along with switching to dry organic nutes instead of phd synthetic)