@Groff solid bit of info there, mate. I'm mainly trying to avoid problems like this: day 33~ but looks stunted with slow growth and what looks to be nute lock out. I fed 1/4 strength grow big twice when I noticed yellowing leaf tips. Not sure if the older pilot/fan leaves are just normally dying, but the tips still have me worried. Flushing today to free the soil up, and will definitely start adding cal mag to my nutes because I switched to led. Hours upon hours of learning and I'm really enjoying this hobby.