I have lots of problems turning up with my leaves. It may be heat stress or low humidity, average temps are peaking about 81-82 sometimes but mostly under 80. Humidity it around 35 even with a humidifier. I have an oscillating fan and an exhaust fan with carbon filter. 10x 2' T5HO and 2x4' T5HO side lighting. 180w Advanced LED, waiting on 180w GLH for the other side. Leaves have brown spots, don't know why. Have top dressed with 3/4 cup dolomite lime in the 3 gal pots. Had some Mg / Cal defficient plants and treated them with Epsom foliar and Cal / Mag which I add ad 1 tsp / gal to every watering. I am using FF organic trio (Big Bloom, Grow Big, Tiger Bloom). These plants were in need of watering at the time. Checked for bugs and found none.