Can anyone help me diagnose what this problem is? These plants are 3 weeks one day into 12/12 and they are under a 1kw HPS. I feed them general Hydroponics nutes every 6 days at full strength and every 3rd day i water with plain ph balanced water. I noticed these spots about a month ago and just decided to watch them but they never seem to hurt the plant but they seem to be getting worse so i want to see what it is now. The seeds were just some bag seed that im growing to get better at growing so i can feel comfortable using the carameliscious seeds i bought. Anyway here are the pics i took today some are just of the plants. All help is appreciated.