4000 Watt Grow Room Help

I've been running a 2000 watt grow room for the past few years. I jumped up to 4000 watts with a mini split recently. So far I am having issues with my grow. I believe that I am running into low humidity problems but am unsure. The plant leaves at the top of the canopy are super crinkled and bent over almost as if over watered. The plants are growing super slow. With my 2000 watt room I want to say I had low humidity as well but never had this issue.

I am running a ebb and flow and I can see tons of roots coming out of the bottom of the bucket. So I do not think its a over watering issue. I am watering 3x a day @ 5.8ph and 890 ppm.

My temps are 76 degree's and the humidity is ~30. I have a commercial humidifier on order.

Does anyone have any insight on what else to look into? Does this sound like a low humidity issue? For now I have killed two lights to try and get the humidity back up.

Pictures?

Pics incoming.

Flood more often.

I know every system is different, but I flood every 1.5 hours when using buckets, or tables.
Always have, Always will.

Flooding also exchanges air in your growing pots so it's good in that way.

If all else is the same since other than the extra lighting (and likely heat)
I'll bet you're not flooding enough.

without pics is hard to say.

I figured out my problem. I was only using a 8" passive intake and a 483cfm exhaust fan, from my research I was about 600cfm short. Not enough air flow for the room. I've jumped up to a 1200 cfm fan with 2 8" intakes and a humidifier.