Issue with leaves (canoeing, lime green tips, burnt looking leaves)

I think they are getting fed to much and this is a result of that. I would invest in a TDS pen asap and start monitoring your ec/ppm of your feeding solution and runoff, this will give you a solid indicator of whats happening in the pot and how to correct a lot of issues. burnt tips are signs of overfeeding but on the edges are issues with potassium. lime green new growth could be something else but not the end of the world. Autos also like to feed less then photoperiods. I like referencing this web page for auto feeding guides. https://www.autoflower.net/forums/threads/med-man-method-feeding-chart-ppm-ec.47856/ its a good basic guide and you can tweak it from what your plants need. Best Of Luck! ***disclaimer, multiple people are answering all questions as there is a contest called GOTM, when a user is selected as the answer they get a point. Please see the contest page for information regarding the details: growdiaries.com/giveaways/GotM-August-2022 Please note, when you reply to anything on the questions part of Growdiaries website, no one will be notified of this. Not even if you use a "@" tag in their name. Best to reach out to them in DM using your inbox, it can be found in the bottom right hand corner of the site. It's the small paper airplane button, it will be highlighted green if you have new messages***