Here's two autos 47 days old alien vs triangle from Mephisto, took the EC up to 1.3 and the one plant got the Rusty spots, which could be so many different things hard to determine which one. So backed the EC back down to 1.0 they get feed 5 times a day. The only thing I noticed and checked was the Coco on the outside of the 6 inch Halo ring. So I flushed the Coco on the outside of ring. With EC 1.0 nutrients and it came out 1.6 so for now on I will have to hand flush around the outside of Halo ring. Other plant not showing any of the Rusty spots but I will do the same to it also.