Still confused.

Its a royal drawf auto.so I've been asking about this particular plant a few times and I can not figure out what is wrong. Its in soil and coco I feed it alittle less then what fox farm recommends at 7 weeks but the leeavws keeping getting worse. It was doing this the first 2 weeks then stopped for awhile and stated again. Ph between 6.3 to 6.8. Thanks u for the replies. I have a sf1000 so about 100 true watts about 24 inches away and temp is 74 to 83 RH is between 40 and 65. Please help and thank if u take the time to read this

Bagged / buffered coco, or big block garden bed coco?

Did you pre-rinse and buffer the coco, before you mixed it in?
Did you lime your mix?

Is the soil holding a lot of water, and how regularly are you watering?

What else other than coco, did you add for aeration / drainage?

Is that the ph of your water, or your mix?

Block mixed with regular garden soil and coo was rinsed with cal-mag before i mixed with soil. Its a 3 gal pot i water 1 gal about every 3 days until runoff. Its light before I water again. About 30% perlite and that ph is the water going in. Run off water only drops to about 6.2

Whole calcium imho, would have been a better choice than calmag solution. Because of the coco's own inertness and high CEC. You ideally want a slow release, so the cec sites replenish. The coco itself could be robbing your soil. It's definitely possible.

How have you been ferting? Organic matter, or salt based? (or both) And how much? How often?

Is there lime in your soil?