Help diagnosing yellowing leaves 5th week of flower

Dasnuggster

420 Member
Some of my leaves have been turning yellow. Started yesterday. Some are just turning others are full yellow. I tried taking pics before lights got too bright but they all pretty much look like the more clear pics. Some more yellow than others and it looks like its starting from the bottom moving up.

Its roots organics soil. I feed water feed always water when its fully dry. Using roots organic products following their feeding schedule. I couldnt get their hpk so adding a little seaweed extract. Been feeding that since flowering. Itll be five weeks tomorrow. This just started yesterday.
Water with ph between 6.5-6.8. Last watering was at 6.75.
Temps between 70-82
Rh 40-55
2 400 watt air cooled hps
Ones a northern lights the other amnesia haze. Both have it.
Kinda slow moving. Affected a cpuple leaves here and there and hasnt progressed too much since. But its only been like 2 days
 
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