0kgSHEQ by Orneryman posted Jan 9, 2018 at 4:54 PM SjVeGmA by Orneryman posted Jan 9, 2018 at 4:54 PM These dry patches starting showing on some of my large fan leaves a couple days ago. It started on just one leaf towards the bottom of the plant and its spread to now 4 of the large fan leaves towards the top of the plant. It's not any pests or bugs. It's greenish-brown but its dried out and crumbles to the touch. I've done some research and think it could be calcium deficiency. A second or third opinion would be greatly appreciated. I've included a troubleshooting copy paste and a couple pictures E-indoor or outdoor-Indoor E-soil, soilless, coco, aero, or hydroponic-Soil E-specific medium- FFOF mixed with perlite CSL-Soil type/brand-FFOF mixed with perlite HCL-Hydro/aero/soilless system type SCL-Anything you have added to the soil-I was using Fox Farm Grow Big until I realized the perlite I'm using has nutes already added, so I stopped adding nutrients about 2 weeks ago after realizing it was burning the tips of new growth. SCLR-Soil or slab runoff pH- Haven't checked, too soon to water again until a couple days. E-Water source-Bathroom tap E-Source water pH -It comes out of the faucet at ~8 ph and I use PH down to get it anywhere between 6.0-6.5 HRT-Source water EC (if hydro) E-Age of plant- ~5-6 weeks haven't really been keeping track E-Type of fertilizer- Was using Fox Farm Grow Big until about 2 weeks ago. E-Rate of application (if hydro, this is your PPM number, preferably after each component is added)-I was using about 1/3 the recommended dosage on the bottle. I have a ppm meter but didn't check it unfortunately. E-Lighting source and distance from plant-2 300w LED about 20 inches from top of plant. E-Air temperature (both day and night if you are running a dark period)- In the tent it fluctuates anywhere from 20C to 27C HD-Reservoir temperature E-Air % Relative humidity-With a humidifier blowing near the intake fan it stays ~55% RH E-Lighting schedule- 24 Hours on E-Type of ventilation your room has-The tent is 2'x2'x4'. I'm using two 4" ventilation fans, one near the bottom and one at the top. TR-Did you pre-soak your media in pH corrected solution?