Medellin by Lemonnade (sativa) DWC

Everything going according to plan. Automation setup is feeling really great. Had a problem where the pH controller was dosing and it wasn't getting mixed into the control tank -- so I added a tiny 3 watt submersible pump to just stir up the water in the control tank. Auto top off, ATO, seems to be working well, have had to adjust it a little, and also schedule around in the morning where I schedule after the recirculating pump runs (as it changes the level). Been incrementally adjusting the low stress training, once or twice a day. Growth seems to be manageable. I have to look at previous diaries, but this has come along QUICK in veg. I might add the scrog net next week. Cut a few fan leaves that were off the main stalks. Res change planned for Thursday. Res change Nov 17th: GH Trio week 3 formula at 80%, wound up with 1000ppm in the tank (using old meter). Still having trouble with the new meter, I should probably try to get a replacement. It wound up going from reading too high, to not reading. I switched out the pH Down from the pH controller, and put in pH up. It's only drifted up since the change, of course. But, end of last tank the trend was steady-to-down, so... I figured it was time. Nov 18th: Knocked the PPM down to 800 after I noticed some slight yellowing (photo added). Have 600ppm in the ATO tank. Nov 21st: Seeing some signs of burn sliiiightly on some tips.