I just switched to Athena Pro from GH using the Lucas Formula. I run Mother Earth coco with 30% pearlite mix in fabric pots in an enclosed room and fertigate 6 times day… I ran 2.0 ec in veg under HLG 600 R Spec lights (I veg out trees in my flowering room because my veg tent is small and I want to stay legal lol) and they looked amazing with no tip burn… When I went into flower I started feeding 2.7 because I felt like 3.0 would be hot even though I have no experience with salts lol. I got a lot of tip burn in the first week of flower and called Athena for help and they told to check my run off and it was maxing out my Hanna at 6.00 EC. The guy suggested that I run half strength at 1.5 EC for a few feeds to flush the excess salts and then go back to 3.0. He said the run off should be around 4.0 running the heavy 3.0 feed. The guy also said he runs straight coco with no pearlite so I’m wondering if maybe 3.0 isn’t too hot because his medium isn’t drying out as fast as mine… This advice still kind of confused me because it seemed like it would present the same problems I had to begin with so instead I just slowly tapered my EC down until I stopped seeing new signs of burning and now I’m running 1.85 with no signs of deficiencies for the past week and a half and I’m 2.5 weeks into flower. I’m wondering if a lower EC is okay with more frequent fertigation as long as the plants look healthy or would I get better results if I run a higher EC while achieving more run off to relieve salt build up in the root zone (I am running the cleanse at 2ml/gal)… It seems like the salts allow the plants to handle higher EC because I have friends who run 3.0 EC with no burn but they also only fertigate 1-2 times a day in straight coco. I always lean towards the less is more mantra and hate wasting nutrients. If I fed at 3.0 a 25lb bag wouldn’t even last a full run for me. I also understand you guys think Athena is light on Ca and Mg… I don’t have purple stems but I do see some purple veins starting on the fan leaves of the Birthday Cake I’m running but I’ve heard that that’s just strain specific…