Brown spots please help

Yeah I was leaning to cal or mag after doing some research. I appreciate the link ill check it out. Yeah I know that the water has chlorine but don't know about chloramine. I let it sit open for about 72 befor I use it. Ppm is 192. Any idea why my run off ppm would be 4800? Waterd today and that was the ppm. I'm only using FFOF at this point no nutes yet. I have been under watering up to this point.

@Dustsheep FoxFarm comes with nutrients in it; so that's the 4800. Are you using a 500 scale or 700 scale TDS tester?

Ok thats what I thought. It just seemed high. The ppm reader has both0.5 and0.7 if that is what you mean by 500 and 700?. The 5 reads 4800 and the 7 reads like 7900 I think.

@Dustsheep You could balance the temp in the room that your tent is sitting in. Might be easier and cheaper than throwing a heater in the tent.

Keep an eye on the leaves. If it starts getting worse, you may want to start adding some cal-mag at 1/4 dose or less. I've noticed FFOF goes through it around days 20-25 and deficiencies start popping up slowly.

Yeah kida thought it was a cal/mag thing. Managing my environment has been tough. It -21 c where I am and its super dry here. I keep the heat at 21c in the house and cover the vent in the room with the tent. I run a cool mist humidifier which helps with the humidity and heat during the day. I run 220 cfm exhaust but if I put it on full to pull the heat it plunges the humidity but if I only run it half speed to keep the humidity up without the cool mist my temps will run well north of 30c Environment stress has been a nightmare. I will definitely keep watching the leaves and I have some cal/mag ready to go.

@Dustsheep What about making a lung room just outside the tent? You could do it with a smaller tent or a large wardrobe box even. Throw the humidifier in there and run the fan in the tent. If needed, you could keep a bowl or bucket of ice in the lung room and pull cool air through.