FastBuds Gorilla Glue Auto

This week went pretty well! I'm starting with Ironhead's updated method for coco found on grasscity. I believe I may be running into phosphorus issues because there is some slight darkening on a few of my leaves, but I think this may be due to underwatering as I left over the weekend and came home to some very dry coco. The guides I have read said the older leaves may not recover but new ones shouldn't show signs of discoloration so I'm waiting for the new ones to grow a little more. The one plant you see with a veggie tie on it was also drooped over on it's side but has now seemed to gain it's strength back. I tried posting close ups of the problem leaves, they also have some denting/twisting which is another reason I believe it was underwatered. Any other opinions would be greatly appreciated though, I am somewhat familiar with plants in general but this is my first ever cannabis grow so I've got a lot to learn. Setup for those curious and other new growers: TENT: 4x4 Vivosun tent - Seems comparable to all other tents at this price point, it took like 15 minutes to build and I've noticed no light leak at all, though I've heard pinholes usually form with time so I'll update my journal if I notice any LIGHT: Timber Grow Lights Redwood VS - These are really sturdy, I was actually able to hold it on one end and there's absolutely 0 flex in the frame and it includes a dimmer so I'm adjusting to 300W during veg up to the full 640W for flower. All of the light information regarding PPFD is also available on their site, I'm not very familiar with this info so I won't speak on it. FAN: AC Infinity T6 - This fan is amazing so far and runs very quiet, but it creates negative pressure at the lowest setting so I would recommend the T4 model for 4x4 if I were to rebuy fans for the sake of saving money CARBON FILTER: Phresh Intake Filter 6 in x 8 in 270 CFM - I see a lot of people buy really large filters, but I read improperly matching the filter can reduce the life length of the carbon inside, if you visit Phresh's website they have a calculator to show you the appropriate size filter. I ended up getting a smaller and cheaper filter after checking that so I recommend looking that up for new growers Misc: I bought two wire shelves from Home Depot and cut some weather treated 2x6 wood to raise it off the floor. This has made watering to drain a breeze since I can reach underneath and pull all of my drip trays out. I bought a Buckethead vacuum but find it more tedious than just pulling them out and dumping them. I also have fans coming, I bought 6x USB powered 6" fans and a USB hub to plug them into in order to conserve outlets in my power strip in case I ever need to add anything else. After receiving those I will work on cable management and hopefully get it all nice and pretty. Cheers!