Purple Glue in coco

So move done plants spreading in it's new home. Removed dead and dying leaves. Found I was getting far less runoff and salts showing on surface. So that was probably my problem. I flushed with 5 gallon of highly diluted water / nutes ( about 10 % strength). Then gave a feed of regular strength. Which is how I usually do flushes with coco. I got a bit of nute burn from this. Not bad. But I think I'll have to dial back strength as I also upped my normal feed sched to get back to 10 % to 20 % run off. I am getting some heat issues on top buds in some areas. So thinking I'm getting some hot spots. When this grow done I want to get my lights spaced better with my full spectrum sp 250 in middle and my 2 blurpies on sides and better fan placement. Getting thing dialed in in new tent in mid flower is not where I wanted to be but the 2 x4 tent was not working with this monster. Lol. Update. Buds swelling up. Some weight issues but expected this as plant was more supported and cramped in 2 x4. Still having leaf issues. Focused on 1 branch. And side branching off branch. Might clean that up now plant should be out of move shock. But so close to end I dont want to shock again.