With brown, dying tips, I'm thinking this is fert burn, especially since it's Advanced. Seems like people have difficulty using this brand. I think Jessie's problem was also too much fert, but I don't know what fert he was using. When I read the words "DWC with Advanced" in your post, I thought Well, that's probably the problem right there. I didn't see your use of a ppm meter, so if you're not using one it might be smart to do so and get your ppms down some and try to keep them there at least for a while and see what happens. Measure your current ppm and don't get close to it again.
If you want to try a different fert, I'd suggest Dynagrow 7-9-5 at the grow shop or online. Just don't add it to Advanced, but make it a separate fresh fert and water mix. This is a one-part fert and has all the micro nutes plants need. Just doesn't have a very long shelf life. PPM around 600 for babies and raise it a little if they yellow. 1000-1200 or so for adult grow. Supernatural Aqua is good too. Just be careful cuz crystal ferts are stronger than liquids.
polishpollack Reviewed by polishpollack on . Crispy tips, yellow n brown spots on fan leaves First of all I'd like to send a general message out to those with plant problems: it helps absolutely no one when the title of your thread says something along the lines of: "help I've got issues!!! Please!!" A title like this is so vague and obvious that it helps nobody. Not the people looking for solutions to similar problems, not to those willing to help you, and ultimately not you either looking for a solution to your PARTICULAR problem. Moving on... I'm doing this on my phone so Rating: 5