Hey y'all! Second grow attempt here, and have had some smooth sailing with this Meph Grape Crush for the past 45 days, but the past day or 2 I've noticed this lightening of leaves progressing up the plant. The lower leaves have gotten the lightest, browning in spots and feeling harder, not quite brittle, but approaching it.

She's growing in 50/50 FFOF/Happy Frog. Since preflower, she's been fed weekly with TPS Silica Gold and the Flora Trio from General Hydro, all at half strength, and pH'd to approximately 6.2-6.4. Every other watering is supplemented with Recharge.

Got a 150W AeroLight about 1-1.5 feet over the top cola. The only circulation fan is in the light, blowing directly down onto the plant, I've been considering getting a clip on fan to help the lower canopy a bit better.

Humidity has been high for most of the grow, about 75% /-5%, trying to balance VPD with high-ish temps in my tent (averaging about 81 degrees most of the time), but I've begun dropping it down towards the 50's.

I'm blown away by how well this plant has taken care of herself so far, I've had no issues up til now, and just find myself a bit stumped on a best course of action from here. I greatly appreciate your time, consideration, and (possibly) input! Thank you!