I am starting to get these orange stains and burns on my big fan leaves ? What is the problem ? I grow with 250w HPS Sputnik Air Cooled + 125w CFL . I am very careful with fertilizer . I use only the minimal amount ans every time , i water up to twice a day , once until water goes out from the bottom . I water only when neccesery . I have growing wxpirience but never got into trouble before . What is it all about ? The plants look healthy .
You don't say what fertilizer you're using. Different strains have different needs so what worked before might not be ok for these gals. Check this link, it might be a lack of phosphorus http://www.growweedeasy.com/phosphorus-deficiency-cannabis